Instrukcja obsługi Microchip MCP1802

Microchip nieskategoryzowany MCP1802

Przeczytaj poniżej 📖 instrukcję obsługi w języku polskim dla Microchip MCP1802 (28 stron) w kategorii nieskategoryzowany. Ta instrukcja była pomocna dla 25 osób i została oceniona przez 2 użytkowników na średnio 4.5 gwiazdek

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 2010 Microchip Technology Inc. DS22053C-page 1

MCP1802

Features:

• 300 mA Maximum Output Current

• Low Dropout Voltage, 200 mV typical @ 100 mA

• 25 µA Typical Quiescent Current

• 0.01 µA Typical Shutdown Current

• Input Operating Voltage Range: 2.0V to10.0V

• Standard Output Voltage Options:

- (0.9V, 1.8V, 2.5V, 3.0V, 3.3V, 5.0V, 6.0V)

• Output voltage accuracy:

- ±2% (VR > 1.5V), ±30 mV (VR  1.5V)

• Stable with Ceramic output capacitors

• Current Limit Protection

• Shutdown pin

• High PSRR: 70 dB typical @ 10 kHz

Applications:

• Battery-powered Devices

• Battery-powered Alarm Circuits

• Smoke Detectors

• CO2 Detectors

• Pagers and Cellular Phones

• Wireless Communications Equipment

• Smart Battery Packs

• Low Quiescent Current Voltage Reference

• PDAs

• Digital Cameras

• Microcontroller Power

• Solar-Powered Instruments

• Consumer Products

• Battery Powered Data Loggers

Related Literature:

• AN765, “Using Microchip’s Micropower LDOs”,

DS00765, Microchip Technology Inc., 2002

• AN766, “Pin-Compatible CMOS Upgrades to

BiPolar LDOs”, DS00766,

Microchip Technology Inc., 2002

• AN792, “A Method to Determine How Much

Power a SOT23 Can Dissipate in an Application”,

DS00792, Microchip Technology Inc., 2001

Description:

The MCP1802 is a family of CMOS low dropout (LDO)

voltage regulators that can deliver up to 300 mA of

current while consuming only 25 µA of quiescent

current (typical). The input operating range is specified

from 2.0V to 10.0V, making it an ideal choice for two to

six primary cell battery-powered applications, 9V

alkaline and one or two cell Li-Ion-powered

applications.

The MCP1802 is capable of delivering 100 mA with

only 200 mV (typical) of input to output voltage

differential (VOUT = 3.0V). The output voltage tolerance

of the MCP1802 at +25°C is typically ±0.4% with a

maximum of ±2%. Line regulation is ±0.01% typical at

+25°C.

The LDO output is stable with a minimum of 1 µF of

output capacitance. Ceramic, tantalum or aluminum

electrolytic capacitors can all be used for input and

output. Overcurrent limit with current foldback provides

short-circuit protection. A shutdown (SHDN) function

allows the output to be enabled or disabled. When

disabled, the MCP1802 draws only 0.01 µA of current

(typical).

The MCP1802 is available in a SOT-23-5 package.

Package Types

SOT-23-5

1 2 3

5 4

VOUT NC

VIN SHDNVSS

300 mA, High PSRR, Low Quiescent Current LDO

MCP1802

DS22053C-page 2  2010 Microchip Technology Inc.

Functional Block Diagram

Typical Application Circuit

MCP1802

VIN VOUT

GND

+VIN

Error Amplifier

Voltage

Reference Current Limiter

Shutdown

Control

SHDN

+VIN

MCP1802

VIN

CIN

1 µF

COUT

1 µF Ceramic

VIN

Battery

VOUT

GND

SHDN

Ceramic

VOUT

3.3V @ 40 mA

SOT-23-5 mA

 2010 Microchip Technology Inc. DS22053C-page 3

MCP1802

1.0 ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings †

Input Voltage ................................................................. +12V

Output Current (Continuous) ..................... PD/(VIN-VOUT)mA

Output Current (Peak) ............................................... 500 mA

Output Voltage ............................... (V

SS-0.3V) to (VIN+0.3V)

SHDN Voltage..................................(V

SS-0.3V) to (VIN+0.3V)

Continuous Power Dissipation:

5-Pin SOT-23-5 .................................................... 250 mW

† Notice: Stresses above those listed under “Maximum

Ratings” 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. Exposure to maximum rating conditions

for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

Electrical Specifications: Unless otherwise specified, all limits are established for V IN = VR + 1.0V, Note 1, COUT = 1 µF (X7R),

CIN = 1 µF (X7R), VSHDN = VIN, T

A = +25°C

Parameters Sym Min Typ Max Units Conditions

Input / Output Characteristics

Input Operating Voltage VIN 2.0 — 10.0 V Note 1

Input Quiescent Current Iq— 25 50 µA IL = 0 mA

Shutdown Current ISHDN — 0.01 0.10 µA SHDN = 0V

Maximum Output Current IOUT_mA 300

300

260

—

mA V R  2V, VIN = VR +1.0V

1.5V VR  2.0V, V

IN =3.0V

1.0V VR  1.5V, V

IN = VR +1.5V

0.9V VR  1.0V, V

IN =2.5V

Current Limiter ILIMIT — 380 — mA if VR  1.75V, then VIN = VR + 2.0V

Output Short Circuit Current IOUT_SC — 50 — mA if VR  1.75V, then VIN = VR + 2.0V

Output Voltage Regulation VOUT VR-2.0% VRVR+2.0% V VR  1.45V, IOUT = 30 mA, Note 2

VR-30 mV VRVR+30 mV VR  1.45V, IOUT = 30 mA

VOUT Temperature

Coefficient

TCVOUT — 100 — ppm/°C IOUT = 30 mA, -40°C TA  +85°C,

Note 3

Line Regulation VOUT/

(VOUTX VIN)

-0.2 ±0.01 +0.2 %/V (VR + 1V) VIN 10V, Note 1

VR  1.75V, IOUT = 30 mA

VR  1.75V, IOUT = 10 mA

Load Regulation VOUT/V OUT —

—

100

mV IL = 1.0 mA to 100 mA, Note 4

IL = 1.0 mA to 300 mA,

Dropout Voltage, Note 5 VDROPOUT — 60 90 mV IL = 30 mA, 3.1V VR  6.0V

— 200 250 IL = 100 mA, 3.1V VR  6.0V

— 80 120 IL = 30 mA, 2.0V VR  3.1V

— 240 350 IL = 100 mA, 2.0V VR < 3.1V

— 2.07 - VR2.10 - VRV IL = 30 mA,VR  2.0V

— 2.23 - VR2.33 - VRIL = 100 mA, VR < 2.0V

Power Supply Ripple

Rejection Ratio

PSRR — 70 — dB f = 10 kHz, IL = 50 mA, VINAC = 1V

pk-pk, CIN

= 0 µF,

if VR  1.5V, then VIN = 2.5V

Output Noise eN— 0.46 — μ √V/ Hz IOUT = 100 mA, f = 1 kHz, COUT =

1μF (X7R Ceramic), VOUT

= 2.5V

Note 1: The minimum VIN must meet two conditions: VIN2.0V and VIN (VR + 1.0V).

2: VR is the nominal regulator output voltage. For example: VR = 1.8V, 2.5V, 3.0V, 3.3V, or 5.0V.

The input voltage VIN = V R + 1.0V or ViIN = 2.0V (whichever is greater); IOUT = 100 µA.

3: TCVOUT = (VOUT-HIGH - VOUT-LOW

) *10 6

/ (V R * Temperature), VOUT-HIGH

= highest voltage measured over the

temperature range. VOUT-LOW = lowest voltage measured over the temperature range.

4: Load regulation is measured at a constant junction temperature using low duty cycle pulse testing. Changes in output

voltage due to heating effects are determined using thermal regulation specification TCV OUT

5: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its measured

value with an applied input voltage of VR + 1.0V or 2.0V, whichever is greater.

Specyfikacje produktu

Marka:	Microchip
Kategoria:	nieskategoryzowany
Model:	MCP1802

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