MICROCHIP MCP1825, MCP1825S Technical data

MCP1825/MCP1825S

500 mA, Low Voltage, Low Quiescent Current LDO Regulator

Features

• 500 mA Output Current Capability

• Input Operating Voltage Range: 2.1V to 6.0V

• Adjustable Output Voltage Range: 0.8V to 5.0V (MCP1825 only)

• 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: 210 mV Typical at 500 mA

• 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) (MCP1825 only)

• Fixed Delay on Power Good Output (MCP1825 only)

• Short Circuit Current Limiting and Overtemperature Protection

• TO-263-5 (DDPAK-5), TO-220-5, SOT-223-5 Package Options (MCP1825).

• TO-263-3 (DDPAK-3), TO-220-3, SOT-223-3 Package Options (MCP1825S).

Applications

• High-Speed Driver Chipset Power

• Networking Backplane Cards

• Notebook Computers

• Network Interface Cards

• Palmtop Computers

• 2.5V to 1.XV Regulators

Description

The MCP1825/MCP1825S is a 500 mA Low Dropout (LDO) linear regulator that provides high current and low output voltages. The MCP1825 comes in a fixed or adjustable output voltage version, with an output voltage range of 0.8V to 5.0V. The 500 mA output current capability, combined with the low output voltage capability, make the MCP1825 a good choice for new sub-1.8V output voltage LDO applications that have high current demands. The MCP1825S is a 3-pin fixed voltage version.

The MCP1825/MCP1825S 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 MCP1825/MCP1825S is typically less than 120 µA over the entire input voltage range, making it attractive for portable computing applications that demand high output current. The MCP1825 versions have a Shutdown (S down, the quiescent current is reduced to less than

0.1 µA.

On the MCP1825 fixed output versions, the scaleddown output voltage is internally monitored and a power good (PWRGD) output is provided when the output is within 92% of regulation (typical). The PWRGD delay is internally fixed at 110 µs (typical).

The overtemperature and short circuit current-limiting provide additional protection for the LDO during system fault conditions.

HDN) pin. When shut

MCP1825/MCP1825S

MCP1825

1234

5

6

SOT-223-5

Pin Fixed Adjustable

1 SHDN

SHDN

2V

IN

V

IN

3 GND (TAB) GND (TAB)

4V

OUT

V

OUT

5 PWRGD ADJ

6 GND (TAB) GND (TAB)

1

2

3

SOT-223-3

4

MCP1825S

1V

IN

2 GND (TAB)

3V

OUT

4 GND (TAB)

Fixed/Adjustable

DDPAK-3DDPAK-5 TO-220-3TO-220-5

12345

123

Package Types

Typical Applications

MCP1825 Adjustable Output Voltage

MCP1825 Fixed Output Voltage

V

OUT

= 1.8V @ 500 mA

VIN = 2.3V to 2.8V

On

Off

1µF

100 kΩ

4.7 µF

C

1

C

2

R

1

SHDN

V

IN

GND

V

OUT

PWRGD

20 kΩ

R

2

V

OUT

= 1.2V @ 500 mA

VIN = 2.1V to 2.8V

On

Off

1µF

40 kΩ

4.7 µF

C

1

C

2

R

1

SHDN

V

IN

GND

V

OUT

V

ADJ

1

MCP1825/MCP1825S

EA

+

–

V

OUT

PMOS

R

f

C

f

I

SNS

Overtemperature

V

REF

Comp

92% of V

REF

T

DELAY

V

IN

Driver w/limit and SHDN

GND

Soft-Start

ADJ/SENSE

Undervoltage

Lock Out

V

IN

Reference

SHDN

Sensing

(UVLO)

Functional Block Diagram - Adjustable Output

Functional Block Diagram - Fixed Output (3-Pin)

EA

+

–

V

OUT

PMOS

R

f

C

f

I

SNS

Overtemperature

V

REF

Comp

92% of V

REF

T

DELAY

V

IN

Driver w/limit and SHDN

GND

Soft-Start

Sense

Undervoltage

Lock Out

V

IN

Reference

SHDN

Sensing

(UVLO)

MCP1825/MCP1825S

EA

+

–

V

OUT

PMOS

R

f

C

f

I

SNS

Overtemperature

V

REF

Comp

92% of V

REF

T

DELAY

V

IN

Driver w/limit and SHDN

GND

Soft-Start

Sense

Undervoltage

Lock Out

V

IN

Reference

SHDN

Sensing

(UVLO)

PWRGD

Functional Block Diagram - Fixed Output (5-Pin)

MCP1825/MCP1825S

1.0 ELECTRICAL

CHARACTERISTICS

† 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

Absolute Maximum Ratings †

VIN....................................................................................6.5V

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

DD

+ 0.3)V

operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.

Maximum Power Dissipation......... Internally-Limited (Note 6)

Output Short Circuit Duration ................................ Continuous

Storage temperature .....................................-65°C to +150°C

Maximum Junction Temperature, T

ESD protection on all pins (HBM/MM)

........................... +150°C

J

........... ≥ 4kV; ≥ 300V

AC/DC CHARACTERISTICS

Electrical Specifications: Unless otherwise noted, VIN = V

I

= 1 mA, CIN = C

OUT

Boldface type applies for junction temperatures, T

= 4.7 µF (X7R Ceramic), TA = +25°C.

OUT

J

OUT(MAX)

(Note 7) of -40°C to +125°C

Parameters Sym Min Typ Max Units Conditions

Input Operating Voltage V

Input Quiescent Current I

Input Quiescent Current for SHDN

Mode

I

Maximum Output Current I

Line Regulation ΔV

(V

OUT

Load Regulation ΔV

Output Short Circuit Current I

OUT/VOUT

OUT_SC

IN

q

SHDN

OUT

x ΔVIN)

/

2.1 6.0 V Note 1

— 120 220 µA IL = 0 mA, V

—0.1 3 µA SHDN = GND

500 ——mAV

— ±0.05 ±0.16 %/V (Note 1) ≤ V

-1.0 ±0.5 1.0 %I

—1.2—AR

Adjust Pin Characteristics (Adjustable Output Only)

Adjust Pin Reference Voltage V

Adjust Pin Leakage Current I

Adjust Temperature Coefficient TCV

ADJ

OUT

0.402 0.410 0.418 VVIN = 2.1V to VIN=6.0V,

-10 ±0.01 +10 nA VIN = 6.0V, V

— 40 — ppm/°C Note 3

Fixed-Output Characteristics (Fixed Output Only)

Voltage Regulation V

Note 1: The minimum V

must meet two conditions: VIN ≥ 2.1V and VIN ≥ V

IN

OUT

VR - 2.5% VR ±0.5% VR + 2.5% V Note 2

2: VR is the nominal regulator output voltage for the fixed cases. VR = 1.2V, 1.8V, etc. VR is the desired set point output

voltage for the adjustable cases. V

3: TCV

= (V

OUT

OUT-HIGH

temperature range. V

– V

OUT-LOW

R

= V

((R1/R2)+1). Figure 4-1.

ADJ *

) *106 / (VR * ΔTemperature). V

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

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 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.

+ V

DROPOUT(MAX)

= V

IN

, Note 1, VR = 1.8V for Adjustable Output,

5.0V

= 2.1V to 6.0V

IN

V

= 0.8V to 5.0V, Note 1

R

= 1 mA to 500 mA,

OUT

(Note 4)

<0.1Ω, Peak Current

LOAD

I

= 1 mA

OUT

OUT(MAX)

OUT-HIGH

OUT(MAX)

, TJ, θJA). Exceeding the maximum allowable power

A

+ V

DROPOUT(MAX).

is the highest voltage measured over the

+ V

DROPOUT(MAX)

.

= 0.8V to

OUT

≤ 6V

IN

ADJ

=0Vto6V

MCP1825/MCP1825S

AC/DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise noted, VIN = V

I

= 1 mA, CIN = C

OUT

Boldface type applies for junction temperatures, T

= 4.7 µF (X7R Ceramic), TA = +25°C.

OUT

J

OUT(MAX)

(Note 7) of -40°C to +125°C

Parameters Sym Min Typ Max Units Conditions

Dropout Characteristics

Dropout Voltage V

DROPOUT

— 210 350 mV Note 5, I

Power Good Characteristics

PWRGD Input Voltage Operating Range

PWRGD Threshold Voltage (Referenced to V

OUT

)

V

PWRGD_VIN

V

PWRGD_TH

1.0 — 6.0 V TA = +25°C

1.2 — 6.0 T

89 92 95 V

90 92 94 V

PWRGD Threshold Hysteresis V

PWRGD Output Voltage Low V

PWRGD Leakage P

PWRGD_HYS

PWRGD_L

WRGD_LK

PWRGD Time Delay T

Detect Threshold to PWRGD Active Time Delay

T

VDET-PWRGD

PG

1.0 2.0 3.0 %V

—0.20.4 VI

—1—nAV

— 110 — µs Rising Edge

— 200 — µs V

Shutdown Input

Logic High Input V

Logic Low Input V

Input Leakage Current SHDN

SHDN

SHDN-HIGH

SHDN-LOW

ILK

45 ——%VINVIN = 2.1V to 6.0V

——15 %VINVIN = 2.1V to 6.0V

-0.1 ±0.001 +0.1 µA VIN=6V, SHDN =VIN,

AC Performance

Output Delay From SHDN

Output Noise e

Note 1: The minimum V

must meet two conditions: VIN ≥ 2.1V and VIN ≥ V

IN

T

OR

N

— 100 — µs SHDN = GND to VIN,

—2.0—µV/√Hz I

2: VR is the nominal regulator output voltage for the fixed cases. VR = 1.2V, 1.8V, etc. VR is the desired set point output

voltage for the adjustable cases. V

3: TCV

= (V

OUT

OUT-HIGH

temperature range. V

OUT-LOW

– V

OUT-LOW

R

= V

((R1/R2)+1). Figure 4-1.

ADJ *

) *106 / (VR * ΔTemperature). V

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

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 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.

+ V

DROPOUT(MAX)

= V

IN

, Note 1, VR = 1.8V for Adjustable Output,

OUT

=2.1V

IN(MIN)

= -40°C to +125°C

A

< 2.1V, I

IN

< 2.5V Fixed,

OUT

= Adj.

OUT

>= 2.5V Fixed

OUT

PWRGD SINK

%V

OUT

V

For V

Falling Edge

V

ADJ = 0V

= VIN = 6.0V

PWRGD

R

to V

SHDN

V

C V

OUT(MAX)

OUT-HIGH

OUT(MAX)

, TJ, θJA). Exceeding the maximum allowable power

A

+ V

DROPOUT(MAX).

is the highest voltage measured over the

+ V

DROPOUT(MAX)

= 10 kΩ

PULLUP

= V

OUT

PWRGD_TH

= GND

= GND to 95% VR

OUT

= 200 mA, f = 1 kHz,

OUT

= 10 µF (X7R Ceramic),

OUT

= 2.5V

OUT

.

= 500 mA,

= 100 µA

SINK

= 1.2 mA,

+ 20 mV

- 20 mV

MCP1825/MCP1825S

AC/DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise noted, VIN = V

I

= 1 mA, CIN = C

OUT

Boldface type applies for junction temperatures, T

= 4.7 µF (X7R Ceramic), TA = +25°C.

OUT

J

OUT(MAX)

(Note 7) of -40°C to +125°C

Parameters Sym Min Typ Max Units Conditions

Power Supply Ripple Rejection

PSRR — 60 — dB f = 100 Hz, C

Ratio

Thermal Shutdown Temperature T

Thermal Shutdown Hysteresis ΔT

Note 1: The minimum V

must meet two conditions: VIN ≥ 2.1V and VIN ≥ V

IN

SD

— 150 — °C I

—10—°CI

2: VR is the nominal regulator output voltage for the fixed cases. VR = 1.2V, 1.8V, etc. VR is the desired set point output

voltage for the adjustable cases. V

3: TCV

= (V

OUT

OUT-HIGH

temperature range. V

– V

OUT-LOW

R

= V

((R1/R2)+1). Figure 4-1.

ADJ *

) *106 / (VR * ΔTemperature). V

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

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 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.

+ V

DROPOUT(MAX)

= V

IN

, Note 1, VR = 1.8V for Adjustable Output,

I

= 100 µA,

OUT

V

= 100 mV pk-pk,

INAC

C

= 0 µF

IN

= 100 µA, V

OUT

V

= 2.8V

IN

= 100 µA, V

OUT

V

= 2.8V

IN

OUT(MAX)

OUT-HIGH

OUT(MAX)

, TJ, θJA). Exceeding the maximum allowable power

A

+ V

DROPOUT(MAX).

is the highest voltage measured over the

+ V

DROPOUT(MAX)

.

OUT

= 4.7 µF,

= 1.8V,

OUT

= 1.8V,

OUT

MCP1825/MCP1825S

TEMPERATURE SPECIFICATIONS

Parameters Sym Min Typ Max Units Conditions

Temperature Ranges

Operating Junction Temperature Range T

Maximum Junction Temperature T

Storage Temperature Range T

Thermal Package Resistances

Thermal Resistance, 3LD DDPAK θ

Thermal Resistance, 3LD TO-220 θ

Thermal Resistance, 3LD SOT-223 θ

Thermal Resistance, 5LD DDPAK θ

Thermal Resistance, 5LD TO-220 θ

Thermal Resistance, 5LD SOT-223 θ

J

A

JA

θ

JC

JA

θ

JC

JA

θ

JC

JA

θ

JC

JA

θ

JC

JA

θ

JC

-40 — +125 °C Steady State

— — +150 °C Transient

-65 — +150 °C

— 31.4 — °C/W 4-Layer JC51 Standard

—3.0 —

Board

— 29.4 — °C/W 4-Layer JC51 Standard

—2.0 —

Board

— 62 — °C/W EIA/JEDEC JESD51-

— 15.0 —

751-7 4 Layer Board

— 31.2 — °C/W 4-Layer JC51 Standard

—3.0 —

Board

— 29.3 — °C/W 4-Layer JC51 Standard

—2.0 —

Board

— 62 — °C/W EIA/JEDEC JESD51-

— 15.0 —

751-7 4 Layer Board

MCP1825/MCP1825S

90

100

110

120

130

140

23456

Input Voltage (V)

Quiescent Current (μA)

130°C

-45°C

25°C

90°C

V

OUT

= 1.2V Adj

I

OUT

= 0 mA

0°C

100

110

120

130

140

150

160

170

180

190

200

0 100 200 300 400 500 600

Load Current (mA)

Ground Current (μA)

VIN=3.3V

V

OUT

= 1.2V Adj

VIN=5.0V

VIN=2.5V

90

100

110

120

130

140

150

160

170

-45 -20 5 30 55 80 105 130

Temperature (°C)

Quiescent Current (μA)

VIN=6.0V

VIN=3.0V

VIN=4.0V

V

OUT

= 1.2V Adj

I

OUT

= 0 mA

VIN=5.0V

VIN=2.1V

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.10

-45 -20 5 30 55 80 105 130

Temperature (°C)

Line Regulation (%/V)

V

OUT

V

IN

I

OUT

= 1 mA

I

OUT

=500 mA

I

OUT

= 50 mA

I

OUT

=100 mA

I

OUT

=100 mA

-0.15

-0.10

-0.05

0.00

0.05

0.10

0.15

0.20

-45-20 5 305580105130

Temperature (°C)

Load Regulation (%)

I

OUT

= 1.0 mA to 1500 mA

V

OUT

= 5.0V

V

OUT

= 3.3V

V

OUT

= 0.8V

V

OUT

= 1.8V

0.4070

0.4075

0.4080

0.4085

0.4090

0.4095

0.4100

0.4105

0.4110

-45 -20 5 30 55 80 105 130

Temperature (°C)

Adjust Pin Voltage (V)

V

OUT

= 1.8V

I

OUT

= 1.0 mA

VIN = 2.3V

VIN = 6.0V

VIN = 4.0V

2.0 TYPICAL PERFORMANCE CURVES

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.

Note: Unless otherwise indicated, C Temperature = +25°C, V

IN

= V

OUT

= 4.7 µF Ceramic (X7R), CIN = 4.7 µF Ceramic (X7R), I

OUT

+ 0.5V, Fixed output.

OUT

= 1 mA,

= 1.2V adj

= 2.1V to 6.0V

MICROCHIP MCP1825, MCP1825S Technical data

TEMPERATURE SPECIFICATIONS

2.0 TYPICAL PERFORMANCE CURVES

FIGURE 2-1: Quiescent Current vs. Input Voltage (Adjustable Version).

FIGURE 2-2: Ground Current vs. Load Current (Adjustable Version).

FIGURE 2-4: Line Regulation vs. Temperature (Adjustable Version).

FIGURE 2-5: Load Regulation vs. Temperature (Adjustable Version).

FIGURE 2-3: Quiescent Current vs. Junction Temperature (Adjustable Version).

FIGURE 2-6: Adjust Pin Voltage vs. Temperature (Adjustable Version).