TC1240 データシートの表示（PDF） - Microchip Technology

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TC1240

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

Microchip Technology 

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

Shutdown Supply Current

Minimum Supply Voltage

Maximum Supply Voltage

Output Current

Sum of the RDS(ON) of the

internal MOSFET Switches

IDD

—

550

900

µA RLOAD = ∞

ISHDN

—

0.01 1.0

µA SHDN = VIN

VMIN

2.5

—

—

V

VMAX

—

—

5.5

V

ILOAD

20

—

— mA

RSW

—

4

8

Ω ILOAD = 20 mA

Oscillator Frequency

Switching Frequency (Note 1)

Shutdown Input Logic High

Shutdown Input Logic Low

Power Efficiency

Voltage Conversion Efficiency

Output Resistance (Note 2)

FOSC

FSW

VIH

VIL

PEFF

VEFF

ROUT

—

160

—

kHz

40

80 125 kHz

1.4

—

—

V

—

—

0.4

V

86

94

—

%

99 99.96 —

%

—

12

—

Ω

—

—

25

Note 1: Switching frequency is one-half internal oscillator frequency.

TA = -40°C to +85°C

TA = -40°C to +85°C

VIN = VMIN to VMAX

VIN = VMIN to VMAX

ILOAD = 5 mA

RLOAD = ∞

ILOAD = 20 µA

TA = -40°C to +85°C

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

capacitance].

 2003 Microchip Technology Inc.

DS21516C-page 3

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