MCP1812A View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

MCP1812A

Ultra-Low Quiescent Current LDO Regulator for Long-Life Battery-Powered Applications

Microchip Technology 

MCP1811A/11B/12A/12B

AC/DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise indicated, VIN = VR + 1V (Note 2), IOUT = 1 mA,

CIN = COUT = 1 μF (MCP1811X) or 2.2 μF (MCP1812X) ceramic (X7R), TA = +25°C, SHDN > 1.4V.

Boldface type applies for junction temperatures TJ of -40°C to +85°C (Note 4).

Parameters

Sym.

Min. Typ. Max. Units

Conditions

Foldback Current

Start-up Voltage Overshoot

Line Regulation

Load Regulation

VOVER

VOUT

VOUT

Dropout Voltage

VDROPOUT

Shutdown Input

Logic High Input

Logic Low Input

Shutdown Input Leakage

Current

Discharge Transistor RDCH

AC Performance

VSHDN-HIGH

VSHDN-LOW

SHDNILK

—

50

—

mA RLOAD = 1MCP1811X)

—

100

—

RLOAD = 1MCP1812X)

—

5

10 %VOUT VIN = 0V to 5.5V

—

±20

—

mV 1.8V < VIN < 5.5V (MCP1811X),

2.4V < VIN < 5.5V (MCP1812X)

—

±25

—

mV IOUT = 1 mA to 150 mA

(MCP1811X) (Note 3)

—

±50

—

IOUT = 1mA to 300 mA

(MCP1812X) (Note 3)

—

400 600

mV IOUT = 150 mA (MCP1811X),

IOUT = 300 mA (MCP1812X)

(Note 5)

70

—

—

%VIN

—

—

20

%VIN

— 0.100 0.500

nA SHDN = GND

—

1.0 20.0

nA SHDN = 5.5V

—

100

—

 MCP1811A/12A

Start-up Delay from SHDN

Start-up Rise Time

Power Supply Ripple

Rejection Ratio

TDELAY

TRISE

PSRR

—

400

—

200

— 1000

—

-50

—

μs SHDN = GND to VIN,

VOUT = GND to 10%VR,

VIN = VR + 1V to 5.5V

μs SHDN = GND to VIN,

VOUT = 10%VR to 95% VR,

VIN = VR + 1V to 5.5V

dB CIN = 0 μF,

VIN = VR + 1V + VINAC/2 or

VIN = VIN_Min + 1V + VINAC/2,

IOUT = 10 mA and Full Load,

VINAC = 0.2Vpk-pk,

f = 1 kHz

1: 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., TA, TJ, JA).

Exceeding the maximum allowable power dissipation will cause the operating junction temperature to exceed

the maximum +85°C rating. Sustained junction temperatures above +85°C can impact device reliability.

2: VR is a nominal regulator output voltage. The minimum VIN must meet two conditions: VIN ≥ VIN(MIN) and

VIN ≥ VR + VDROPOUT(MAX).

3: 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.

4: 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.

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 VIN = VR + 1V.

 2018-2019 Microchip Technology Inc.

DS20006088B-page 5

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