TC1240ECH datasheet(3/18 Pages) MICROCHIP

номер детали	TC1240ECH

подробное описание детали	Positive Doubling Charge Pumps with Shutdown in a SOT-23 Package

PDF	18 Pages

Scroll/Zoom	100%

производитель	MICROCHIP [Microchip Technology]

домашняя страница	http://www.microchip.com

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 2001-2012 Microchip Technology Inc.

DS21516D-page 3

TC1240/TC1240A

TC1240A ELECTRICAL SPECIFICATIONS

Electrical Specifications: Unless otherwise noted, typical values apply at TA = +25°C. Minimum and maximum

values apply for TA = -40° to +85°C, and VIN = +5.0V, C1 = C2 = 3.3 µF, SHDN = GND.

Parameters

Sym

Min

Typ

Max

Units

Conditions

Supply Current

IDD

—

550

900

µA

RLOAD = 

Shutdown Supply Current

ISHDN

—

0.01

1.0

µA

SHDN = VIN

Minimum Supply Voltage

VMIN

2.5

—

Maximum Supply Voltage

VMAX

——

5.5

Output Current

ILOAD

—

Sum of the RDS(ON) of the

internal MOSFET Switches

RSW

—4



ILOAD = 20 mA

Oscillator Frequency

FOSC

—160

—

kHz

TA = -40°C to +85°C

Switching Frequency (Note 1)

FSW

125

kHz

TA = -40°C to +85°C

Shutdown Input Logic High

VIH

1.4

—

VIN = VMIN to VMAX

Shutdown Input Logic Low

VIL

——

0.4

VIN = VMIN to VMAX

Power Efficiency

PEFF

—

ILOAD = 5 mA

Voltage Conversion Efficiency

VEFF

99.96

—

RLOAD = 

Output Resistance (Note 2)

ROUT

—



ILOAD = 20 µA

TA = -40°C to +85°C

Note 1:

Switching frequency is one-half internal oscillator frequency.

Capacitor contribution is approximately 26% of the output impedance [ESR = 1 / switching frequency x

capacitance].

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