1.5A, Low Voltage, Low Quiescent Current LDO Regulator Data Sheet

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© 2007 Microchip Technology Inc.

DS21999B-page 1

MCP1727

Features

• 1.5A Output Current Capability
• Input Operating Voltage Range: 2.3V to 6.0V
• Adjustable Output Voltage Range: 0.8V to 5.0V
• Standard Fixed Output Voltages:

- 0.8V, 1.2V, 1.8V, 2.5V, 3.0V, 3.3V, 5.0V

• Other Fixed Output Voltage Options Available 

Upon Request

• Low Dropout Voltage: 330 mV Typical at 1.5A
• Typical Output Voltage Tolerance: 0.5%
• Stable with 1.0 µF Ceramic Output Capacitor
• Fast response to Load Transients
• Low Supply Current: 120 µA (typ)
• Low Shutdown Supply Current: 0.1 µA (typ)
• Adjustable Delay on Power Good Output
• Short Circuit Current Limiting and 

Overtemperature Protection

• 3x3 DFN-8 and SOIC-8 Package Options

Applications

• High-Speed Driver Chipset Power
• Networking Backplane Cards
• Notebook Computers
• Network Interface Cards
• Palmtop Computers
• 2.5V to 1.XV Regulators

Description

The MCP1727 is a 1.5A Low Dropout (LDO) linear
regulator that provides high current and low output
voltages in a very small package. The MCP1727
comes in a fixed (or adjustable) output voltage version,
with an output voltage range of 0.8V to 5.0V. The 1.5A
output current capability, combined with the low output
voltage capability, make the MCP1727 a good choice
for new sub-1.8V output voltage LDO applications that
have high current demands.
The MCP1727 is stable using ceramic output
capacitors that inherently provide lower output noise
and reduce the size and cost of the entire regulator
solution. Only 1 µF of output capacitance is needed to
stabilize the LDO. 
Using CMOS construction, the quiescent current
consumed by the MCP1727 is typically less than
120 µA over the entire input voltage range, making it
attractive for portable computing applications that
demand high output current. When shut down, the
quiescent current is reduced to less than 0.1 µA.
The scaled-down output voltage is internally monitored
and a power good (PWRGD) output is provided when
the output is within 92% of regulation (typical). An
external capacitor can be used on the C

DELAY

 pin to

adjust the delay from 200 µs to 300 ms.
The overtemperature and short circuit current-limiting
provide additional protection for the LDO during system
fault conditions. 

Package Types

V

IN

V

IN

SHDN

GND

PWRGD

C

DELAY

Sense

V

OUT

V

IN

V

IN

SHDN

GND

PWRGD

C

DELAY

ADJ

V

OUT

Adjustable (SOIC-8)

Fixed (SOIC-8)

V

IN

V

IN

SHDN

GND

PWRGD

C

DELAY

Sense

V

OUT

1

1

2

2

3

3

4

4

5

5

6

6

7

7

8

8

Fixed (3x3 DFN)

V

IN

V

IN

SHDN

GND

PWRGD

C

DELAY

V

OUT

Adjustable (3x3 DFN)

ADJ

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

1.5A, Low Voltage, Low Quiescent Current LDO Regulator

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MCP1727

DS21999B-page 2

© 2007 Microchip Technology Inc.

Typical Application

MCP1727 Adjustable Output Voltage

V

IN

SHDN

GND PWRGD

C

DELAY

ADJ

V

OUT

1

2

3

4

5

6

7

8

1 µF

PWRGD

V

OUT

 = 1.2V @ 1A

100 k

Ω

4.7 µF

V

IN

 = 2.3V to 2.8V

On

Off

V

IN

20 k

Ω

40 k

Ω

R

1

R

2

C

1

C

2

R

3

1000 pF

C

3

MCP1727 Fixed Output Voltage

V

IN

SHDN

GND PWRGD

C

DELAY

Sense

V

OUT

1

2

3

4

5

6

7

8

PWRGD

V

OUT

 = 1.8V @ 1A

V

IN

 = 2.3V to 2.8V

On

Off

V

IN

1 µF

100 k

Ω

4.7 µF

C

1

C

2

R

1

1000 pF

C

3

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© 2007 Microchip Technology Inc.

DS21999B-page 3

MCP1727

Functional Block Diagram - Adjustable Output

EA

+

V

OUT

PMOS

R

f

C

f

I

SNS

Overtemperature

V

REF

Comp

92% of V

REF

T

DELAY

PWRGD

C

DELAY

V

IN

Driver w/limit
and SHDN

GND

Soft-Start

ADJ

Undervoltage 
Lock Out

VIN

 

Reference

SHDN

SHDN

SHDN

Sensing

(UVLO)

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MCP1727

DS21999B-page 4

© 2007 Microchip Technology Inc.

Functional Block Diagram - Fixed Output

EA

+

V

OUT

PMOS

R

f

C

f

I

SNS

Overtemperature

V

REF

Comp

92% of V

REF

T

DELAY

PWRGD

C

DELAY

V

IN

Driver w/limit
and SHDN

GND

Soft-Start

Sense

Undervoltage 

Lock Out

VIN

 

Reference

SHDN

SHDN

SHDN

Sensing

(UVLO)

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© 2007 Microchip Technology Inc.

DS21999B-page 5

MCP1727

1.0

ELECTRICAL 
CHARACTERISTICS

Absolute Maximum Ratings †

V

IN

....................................................................................6.5V

Maximum Voltage on Any Pin .. (GND – 0.3V) to (V

DD 

+ 0.3)V

Maximum Power Dissipation......... Internally-Limited (Note 6)
Output Short Circuit Duration................................ Continuous
Storage temperature .....................................-65°C to +150°C
Maximum Junction Temperature, T

J

........................... +150°C

ESD protection on all pins (HBM/MM)

...........  ≥

  2 kV; 

 200V

† Notice: Stresses above those listed under “Maximum Rat-
ings” may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operational listings of this specification is not implied. Expo-
sure to maximum rating conditions for extended periods may
affect device reliability.

AC/DC CHARACTERISTICS

Electrical Specifications: Unless otherwise noted, V

IN 

= V

OUT(MAX)

 + V

DROPOUT(MAX)

 (Note 1), V

R

=1.8V for Adjustable Output, 

I

OUT

 = 1 mA, C

IN

 = C

OUT

 = 4.7 µF (X7R Ceramic), T

A

 = +25°C.

Boldface type applies for junction temperatures, T

(Note 7) of -40°C to +125°C 

Parameters

Sym

Min

Typ

Max

Units

Conditions

Input Operating Voltage

V

IN

2.3

6.0

V

Note 1

Input Quiescent Current

I

q

120

220

µA

I

L

 = 0 mA, V

IN

 = Note 1,

V

OUT

 = 0.8V to 5.0V

Input Quiescent Current for 
SHDN Mode

I

SHDN

0.1

3

µA

SHDN = GND

Maximum Output Current

I

OUT

1.5

A

V

IN

 = 2.3V to 6.0V

V

R

 = 0.8V to 5.0V, Note 1

Line Regulation

ΔV

OUT

/

(V

OUT 

ΔV

IN

)

0.05

0.16

%/V

(Note 1

≤ V

IN

 

≤ 6V

Load Regulation

ΔV

OUT

/V

OUT

-1.0

±0.5

1.0

%

I

OUT

 = 1 mA to 1.5A,

V

IN

 = Note 1, (Note 4)

Output Short Circuit Current

I

OUT_SC

2.2

A

V

IN

 = Note 1, R

LOAD

< 0.1

Ω, 

Peak Current

Adjust Pin Characteristics (Adjustable Output Only)

Adjust Pin Reference Voltage

V

ADJ

0.402

0.410

0.418

V

V

IN

 = 2.3V to V

IN

= 6.0V,

I

OUT 

= 1 mA

Adjust Pin Leakage Current

I

ADJ

-10

±0.01

+10

nA

V

IN

 = 6.0V, V

ADJ

= 0V to 6V

Adjust Temperature Coefficient

TCV

OUT

40

ppm/°C Note 3

Fixed-Output Characteristics (Fixed Output Only)

Voltage Regulation

V

OUT

V

- 2.5%

V

±0.5%

V

+ 2.5%

V

Note 2

Note 1:

The minimum V

IN

 must meet two conditions: V

IN

 ≥ 2.3V and V

IN

 

 ≥ V

OUT(MAX)

 + V

DROPOUT(MAX).

2:

V

R

 is the nominal regulator output voltage for the fixed cases. V

R

 = 1.2V, 1.8V, etc. V

R

 is the desired set point output 

voltage for the adjustable cases. V

R

 = V

ADJ

 

((R

1

/R

2

)+1). 

Figure 4-1

.

3:

TCV

OUT

 = (V

OUT-HIGH

 – V

OUT-LOW

) *10

6

 / (V

R

 * 

ΔTemperature). V

OUT-HIGH

 is the highest voltage measured over the 

temperature range. V

OUT-LOW

 is the lowest voltage measured over the temperature range.

4:

Load regulation is measured at a constant junction temperature using low duty-cycle pulse testing. Load regulation is 
tested over a load range from 1 mA to the maximum specified output current.

5:

Dropout voltage is defined as the input-to-output voltage differential at which the output voltage drops 2% below its 
nominal value that was measured with an input voltage of V

OUT

 = V

R

 + V

DROPOUT(MAX)

.

6:

The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction 
temperature and the thermal resistance from junction to air. (i.e., T

A

, T

J

θ

JA

). Exceeding the maximum allowable power 

dissipation will cause the device operating junction temperature to exceed the maximum +150°C rating. Sustained 
junction temperatures above 150°C can impact device reliability.

7:

The junction temperature is approximated by soaking the device under test at an ambient temperature equal to the 
desired junction temperature. The test time is small enough such that the rise in the junction temperature over the 
ambient temperature is not significant.

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MCP1727

DS21999B-page 6

© 2007 Microchip Technology Inc.

Dropout Characteristics

Dropout Voltage

V

IN

-V

OUT

330

550

mV

Note 5, I

OUT

 = 1.5A, 

V

IN(MIN)

= 2.3V

Power Good Characteristics

PWRGD Input Voltage Operat-
ing Range 

V

PWRGD_VIN

1.0

6.0

V

T

A

 = +25°C

1.2

6.0

T

A

 = -40°C to +125°C

For V

IN

 < 2.3V, I

SINK

= 100 µA

PWRGD Threshold Voltage
(Referenced to V

OUT

)

V

PWRGD_TH

%V

OUT

Falling Edge

89

92

95

V

OUT 

< 2.5V Fixed, V

OUT

 = Adj.

90

92

94

V

OUT 

>= 2.5V Fixed

PWRGD Threshold Hysteresis

V

PWRGD_HYS

1.0

2.0

3.0

%V

OUT

PWRGD Output Voltage Low

V

PWRGD_L

0.2

0.4

V

I

PWRGD

 

SINK

 = 1.2 mA,

ADJ = 0V, SENSE = 0V

PWRGD Leakage

P

WRGD

_

LK

1

nA

V

PWRGD

 = V

IN

 = 6.0V

PWRGD Time Delay

T

PG

Rising Edge
R

PULLUP

 = 10 k

Ω

I

CDELAY

 = 140 nA (Typ)

200

µs

C

DELAY

= OPEN

10

30

55

ms

C

DELAY

= 0.01 µF

300

ms

C

DELAY

= 0.1 µF

Detect Threshold to PWRGD 
Active Time Delay

T

VDET-PWRGD

200

µs

V

ADJ

 or V

SENSE

 = V

PWRGD_TH

 + 

20 mV to V

PWRGD_TH

 - 20 mV

Shutdown Input

Logic High Input 

V

SHDN-HIGH

45

%V

IN

V

IN

 = 2.3V to 6.0V

Logic Low Input 

V

SHDN-LOW

15

%V

IN

V

IN

 = 2.3V to 6.0V

SHDN Input Leakage Current

SHDN

ILK

-0.1

±0.001

+0.1

µA

V

IN

= 6V, SHDN =V

IN

,

SHDN = GND

AC Performance

Output Delay From SHDN

T

OR

100

µs

SHDN = GND to V

IN

 

V

OUT

 = GND to 95% V

R

 

AC/DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise noted, V

IN 

= V

OUT(MAX)

 + V

DROPOUT(MAX)

 (Note 1), V

R

=1.8V for Adjustable Output, 

I

OUT

 = 1 mA, C

IN

 = C

OUT

 = 4.7 µF (X7R Ceramic), T

A

 = +25°C.

Boldface type applies for junction temperatures, T

(Note 7) of -40°C to +125°C 

Parameters

Sym

Min

Typ

Max

Units

Conditions

Note 1:

The minimum V

IN

 must meet two conditions: V

IN

 ≥ 2.3V and V

IN

 

 ≥ V

OUT(MAX)

 + V

DROPOUT(MAX).

2:

V

R

 is the nominal regulator output voltage for the fixed cases. V

R

 = 1.2V, 1.8V, etc. V

R

 is the desired set point output 

voltage for the adjustable cases. V

R

 = V

ADJ

 

((R

1

/R

2

)+1). 

Figure 4-1

.

3:

TCV

OUT

 = (V

OUT-HIGH

 – V

OUT-LOW

) *10

6

 / (V

R

 * 

ΔTemperature). V

OUT-HIGH

 is the highest voltage measured over the 

temperature range. V

OUT-LOW

 is the lowest voltage measured over the temperature range.

4:

Load regulation is measured at a constant junction temperature using low duty-cycle pulse testing. Load regulation is 
tested over a load range from 1 mA to the maximum specified output current.

5:

Dropout voltage is defined as the input-to-output voltage differential at which the output voltage drops 2% below its 
nominal value that was measured with an input voltage of V

OUT

 = V

R

 + V

DROPOUT(MAX)

.

6:

The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction 
temperature and the thermal resistance from junction to air. (i.e., T

A

, T

J

θ

JA

). Exceeding the maximum allowable power 

dissipation will cause the device operating junction temperature to exceed the maximum +150°C rating. Sustained 
junction temperatures above 150°C can impact device reliability.

7:

The junction temperature is approximated by soaking the device under test at an ambient temperature equal to the 
desired junction temperature. The test time is small enough such that the rise in the junction temperature over the 
ambient temperature is not significant.

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© 2007 Microchip Technology Inc.

DS21999B-page 7

MCP1727

TEMPERATURE SPECIFICATIONS

Output Noise

e

N

2.0

µV/

√Hz I

OUT

 = 200 mA, f = 1 kHz, C

OUT

 

= 10 µF (X7R Ceramic), V

OUT

 = 

2.5V

Power Supply Ripple Rejection 
Ratio

PSRR

60

dB

f = 100 Hz, C

OUT

 = 10 µF,

I

OUT

 = 10 mA, 

V

INAC

 = 30 mV pk-pk,

C

IN

 = 0 µF

Thermal Shutdown Temperature

T

SD

150

°C

I

OUT

 = 100 µA, V

OUT

 = 1.8V, 

V

IN

 = 2.8V

Thermal Shutdown Hysteresis

ΔT

SD

10

°C

I

OUT

 = 100 µA, V

OUT

 = 1.8V, 

V

IN

 = 2.8V

Electrical Specifications: Unless otherwise indicated, all limits apply for V

IN 

= 2.3V to 6.0V.

Parameters

Sym

Min

Typ

Max

Units

Conditions

Temperature Ranges
Operating Junction Temperature Range

T

J

-40

+125

°C

Steady State

Maximum Junction Temperature

T

J

+150

°C

Transient

Storage Temperature Range

T

A

-65

+150

°C

Thermal Package Resistances
Thermal Resistance, 8LD 3x3 DFN

θ

JA

41

°C/W

4-Layer JC51-7 
Standard Board with 
vias

Thermal Resistance, 8LD SOIC

θ

JA

150

°C/W

4-Layer JC51-7 
Standard Board

AC/DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise noted, V

IN 

= V

OUT(MAX)

 + V

DROPOUT(MAX)

 (Note 1), V

R

=1.8V for Adjustable Output, 

I

OUT

 = 1 mA, C

IN

 = C

OUT

 = 4.7 µF (X7R Ceramic), T

A

 = +25°C.

Boldface type applies for junction temperatures, T

(Note 7) of -40°C to +125°C 

Parameters

Sym

Min

Typ

Max

Units

Conditions

Note 1:

The minimum V

IN

 must meet two conditions: V

IN

 ≥ 2.3V and V

IN

 

 ≥ V

OUT(MAX)

 + V

DROPOUT(MAX).

2:

V

R

 is the nominal regulator output voltage for the fixed cases. V

R

 = 1.2V, 1.8V, etc. V

R

 is the desired set point output 

voltage for the adjustable cases. V

R

 = V

ADJ

 

((R

1

/R

2

)+1). 

Figure 4-1

.

3:

TCV

OUT

 = (V

OUT-HIGH

 – V

OUT-LOW

) *10

6

 / (V

R

 * 

ΔTemperature). V

OUT-HIGH

 is the highest voltage measured over the 

temperature range. V

OUT-LOW

 is the lowest voltage measured over the temperature range.

4:

Load regulation is measured at a constant junction temperature using low duty-cycle pulse testing. Load regulation is 
tested over a load range from 1 mA to the maximum specified output current.

5:

Dropout voltage is defined as the input-to-output voltage differential at which the output voltage drops 2% below its 
nominal value that was measured with an input voltage of V

OUT

 = V

R

 + V

DROPOUT(MAX)

.

6:

The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction 
temperature and the thermal resistance from junction to air. (i.e., T

A

, T

J

θ

JA

). Exceeding the maximum allowable power 

dissipation will cause the device operating junction temperature to exceed the maximum +150°C rating. Sustained 
junction temperatures above 150°C can impact device reliability.

7:

The junction temperature is approximated by soaking the device under test at an ambient temperature equal to the 
desired junction temperature. The test time is small enough such that the rise in the junction temperature over the 
ambient temperature is not significant.

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MCP1727

DS21999B-page 8

© 2007 Microchip Technology Inc.

2.0

TYPICAL PERFORMANCE CURVES

NOTE: Unless otherwise indicated V

OUT

 = 1.8V (Adjustable), V

IN

 = 2.8V, C

OUT

 = 4.7 µF Ceramic (X7R), C

IN

 = 4.7 µF

Ceramic (X7R), I

OUT

 = 1 mA, Temperature = +25°C, V

IN

 = V

OUT

 + 0.6V, RPWRGD = 10 k

Ω To V

IN

NOTE: Junction Temperature (T

J

) is approximated by soaking the device under test to an ambient temperature equal

to the desired Junction temperature. The test time is small enough such that the rise in Junction temperature over the
Ambient temperature is not significant.

FIGURE 2-1:

Quiescent Current vs. Input 

Voltage (1.2V Adjustable).

FIGURE 2-2:

Ground Current vs. Load 

Current (1.2V Adjustable).

FIGURE 2-3:

Quiescent Current vs. 

Junction Temperature (1.2V Adjustable).

FIGURE 2-4:

Line Regulation vs. 

Temperature (1.2V Adjustable).

FIGURE 2-5:

Load Regulation vs. 

Temperature.

FIGURE 2-6:

Adjust Pin Voltage vs. 

Temperature.

Note:

The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.

90

100

110

120

130

140

150

2

3

4

5

6

Input Voltage (V)

Qui

escen

t Cu

rren

A)

130

°C

-45

°C

25

°C

90

°C

V

OUT 

= 1.2V Adj

I

OUT 

= 0 mA

100

110

120

130

140

150

160

170

180

190

200

0

250

500

750

1000

1250

1500

Load Current (mA)

Ground

 C

u

rren

t (

μ

A)

V

IN

=3.3V

V

OUT 

= 1.2V Adj

V

IN

=5.0V

V

IN

=2.3V

100

105

110

115

120

125

130

135

140

-45

-20

5

30

55

80

105

130

Temperature (°C)

Qu

iesc

ent Cur

rent 

A)

V

IN

=5.0V

V

IN

=2.5V

V

IN

=4.0V

       I

OUT 

= 0 mA

V

OUT 

= 1.2V Adj

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.1

-45

-20

5

30

55

80

105

130

Temperature (°C)

Li

ne

 R

e

g

u

la

ti

on

 (

%

/V)

V

OUT

 = 1.2V adj

V

IN

 = 2.3V to 6.0V

I

OUT

 = 1 mA

I

OUT

 = 500 mA

I

OUT

 = 1000 mA

I

OUT

 = 100 mA

-0.15

-0.10

-0.05

0.00

0.05

0.10

0.15

-45

-20

5

30

55

80

105

130

Temperature (°C)

Lo

ad

 R

e

g

u

la

tion 

(%)

I

OUT

 = 1.0 mA to 1500 mA

V

OUT

 = 5.0V

V

OUT

 = 3.3V

V

OUT

 = 0.8V

V

OUT

 = 1.8V

0.408

0.409

0.409

0.410

0.410

0.411

-45

-20

5

30

55

80

105

130

Temperature (°C)

A

d

ju

st

 P

in

 Vo

lta

g

e (V

)

I

OUT

 = 1.0 mA

V

IN

 = 6.0V

V

IN

 = 2.3V

V

IN

 = 5.0V

/var/www/html/datasheet/sites/default/files/pdfhtml_dummy/21999b-html.html
background image

© 2007 Microchip Technology Inc.

DS21999B-page 9

MCP1727

NOTE: Unless otherwise indicated V

OUT

 = 1.8V (Adjustable), V

IN

 = 2.8V, C

OUT

 = 4.7 µF Ceramic (X7R), C

IN

 = 4.7 µF

Ceramic (X7R), I

OUT

 = 1 mA, Temperature = +25°C, V

IN

 = V

OUT

 + 0.6V, RPWRGD = 10 k

Ω To V

IN

FIGURE 2-7:

Dropout Voltage vs. Load 

Current (Adjustable Version).

FIGURE 2-8:

Dropout Voltage vs. 

Temperature (Adjustable Version).

FIGURE 2-9:

Power Good (PWRGD) 

Time Delay vs. Temperature.

FIGURE 2-10:

Quiescent Current vs. Input 

Voltage (0.8V Fixed).

FIGURE 2-11:

Quiescent Current vs. Input 

Voltage (2.5V Fixed).

FIGURE 2-12:

Ground Current vs. Load 

Current.

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0

250

500

750

1000

1250

1500

Load Current (mA)

Drop

out Vol

tag

e (V)

V

OUT

 = 2.5V Adj

V

OUT

 = 5.0V Adj

0.30

0.32

0.34

0.36

0.38

0.40

0.42

-45

-20

5

30

55

80

105

130

Temperature (°C)

D

ropo

ut Vo

lt

ag

e (

V

)

V

OUT

 = 3.3V Adj

V

OUT

 = 5.0V Adj

V

OUT

 = 2.5V Adj

I

OUT

 = 1.5A

25

26

27

28

29

30

31

32

-45

-20

5

30

55

80

105

130

Temperature (°C)

P

o

we

r Go

od

 T

ime D

elay

 (m

S

)

C

DELAY

 = 0.01 

μF

V

OUT

 = 1.8V Adj

V

IN

 = 2.4V

V

IN

 = 5.0V

V

IN

 = 3.3V

80

90

100

110

120

130

140

150

2

3

4

5

6

Input Voltage (V)

Qu

iesce

nt C

u

rren

t (

μ

A)

-45°C

+130°C

+85°C

+25°C

V

OUT

 = 0.8V

I

OUT

 = 0 mA

80

90

100

110

120

130

140

150

3

3.5

4

4.5

5

5.5

6

Input Voltage (V)

Q

u

ie

scen

t Cu

rren

t (

μ

A)

V

OUT

 = 2.5V

I

OUT

 = 0 mA

+130

°C

-45

°C

+25

°C

+90

°C

0.00

50.00

100.00

150.00

200.00

250.00

0

250

500

750

1000

1250

1500

Load Current (mA)

G

rou

nd

 C

u

rr

en

A)

V

IN 

= 2.3V for V

R

=0.8V

V

IN

 = 3.1V for V

R

=2.5V

V

OUT

=0.8V

V

OUT

=2.5V

/var/www/html/datasheet/sites/default/files/pdfhtml_dummy/21999b-html.html
background image

MCP1727

DS21999B-page 10

© 2007 Microchip Technology Inc.

NOTE: Unless otherwise indicated V

OUT

 = 1.8V (Adjustable), V

IN

 = 2.8V, C

OUT

 = 4.7 µF Ceramic (X7R), C

IN

 = 4.7 µF

Ceramic (X7R), I

OUT

 = 1 mA, Temperature = +25°C, V

IN

 = V

OUT

 + 0.6V, RPWRGD = 10 k

Ω To V

IN

FIGURE 2-13:

Quiescent Current vs. 

Temperature.

FIGURE 2-14:

I

SHDN

 vs. Temperature.

FIGURE 2-15:

Line Regulation vs. 

Temperature (0.8V Fixed).

FIGURE 2-16:

Line Regulation vs. 

Temperature (2.5V Fixed).

FIGURE 2-17:

Load Regulation vs. 

Temperature (V

OUT

 < 2.5V Fixed).

FIGURE 2-18:

Load Regulation vs. 

Temperature (V

OUT

 

≥ 

2.5V Fixed).

95

100

105

110

115

120

125

130

-45

-20

5

30

55

80

105

130

Temperature (°C)

Q

u

ies

cen

t C

u

rren

t (

μ

A)

V

OUT

 = 0.8V

V

OUT

 = 2.5V

I

OUT

 = 0 mA

0.00

0.05

0.10

0.15

0.20

0.25

0.30

-45

-20

5

30

55

80

105

130

Temperature (°C)

Is

hdn

 (

μ

A)

V

IN

 = 2.3V

V

IN

 = 4.0V

V

IN

 = 6.0V

V

R

 = 0.8V

0.00

0.02

0.04

0.06

0.08

0.10

-45

-20

5

30

55

80

105

130

Temperature (°C)

Li

n

e

 R

e

g

u

la

ti

on (%

/V)

V

OUT

 = 0.8V

V

IN

 = 2.3V to 6.0V

I

OUT

 = 1 mA

I

OUT

 = 100 mA

I

OUT

 = 500mA

I

OUT

 = 1A

0.015

0.020

0.025

0.030

0.035

0.040

0.045

-45

-20

5

30

55

80

105

130

Temperature (°C)

L

ine

 R

egu

la

ti

o

n

 (%

/V

)

I

OUT

 = 1000 mA

I

OUT

 = 1 mA

I

OUT

 = 100 mA

I

OUT

 = 1500 mA

I

OUT

 = 500 mA

           V

R

 = 2.5V

V

IN

 = 3.1 to 6.0V

-0.30

-0.20

-0.10

0.00

0.10

0.20

0.30

-45

-20

5

30

55

80

105

130

Temperature (°C)

Lo

ad

 Re

gu

lat

io

n

 (%)

V

OUT

 = 0.8V

I

OUT

 = 1 mA to 1500 mA

V

IN

 = 2.3V

-0.45

-0.40

-0.35

-0.30

-0.25

-0.20

-0.15

-0.10

-0.05

0.00

-45

-20

5

30

55

80

105

130

Temperature (°C)

Lo

ad

 R

egu

la

ti

o

n

 (%

)

V

OUT

 = 2.5V

V

OUT

 = 5.0V

I

OUT

 = 1 mA to 1500 mA

Maker
Microchip Technology Inc.
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