TCM828ECT713 datasheet(2/9 Pages) MICROCHIP

Part #	TCM828ECT713

Description	Switched Capacitor Voltage Converters

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Manufacturer	MICROCHIP [Microchip Technology]

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2

TCM828/829-4

5/22/00

Switched Capacitor

Voltage Converters

TCM828

TCM829

DS21488A

ABSOLUTE MAXIMUM RATINGS*

Input Voltage (VIN to GND) ......................... +6.0V, – 0.3V

Output Voltage (OUT to GND) .................... –6.0V, + 0.3V

Current at OUT Pin .................................................. 50mA

Short-Circuit Duration – OUT to GND ................ Indefinite

Operating Temperature Range ............... – 40

°C to +85°C

Power Dissipation (TA ≤ 70°C)

5-Pin SOT-23A ............................................... 240mW

Storage Temperature (Unbiased) ......... – 65

°C to +150°C

Lead Temperature (Soldering, 10 sec) ................. +300

°C

*This is a stress rating only and functional operation of the device at these

or any other conditions above those indicated in the operational sections

of the specifications is not implied. Exposure to absolute maximum rating

conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS: TA = 0°C to +85°C, VIN = +5V, C1 = C2 = 10µF (TCM828), C1 = C2 = 3.3µF

(TCM829), unless otherwise noted. Typical values are at TA = +25°C.

Symbol Parameter

Device

Test Conditions

Min

Typ

Max

Unit

IDD

Supply Current

TCM828

TA = +25°C

—

50

90

µA

TCM829

—

115

260

V

+

Minimum Supply

RLOAD = 10kΩ: TA = 0°C to +85°C

1.5

—

V

Voltage

V

+

Maximum Supply

RLOAD = 10kΩ

—

5.5

V

Voltage

FOSC

Oscillator Frequency

TCM828

TA = +25°C

8.4

12

15.6

kHz

TCM829

24.5

35

45.5

PEFF

Power Efficiency

ILOAD = 3mA, TA = +25°C—

96

—

%

VEFF

Voltage Conversion

RLOAD = ∞

95

99.9

—

%

Efficiency

ROUT

Output Resistance

IOUT = 5mA, TA = 25°C

—

25

50

Ω

TA = 0°C to +85°C—

—

65

ELECTRICAL CHARACTERISTICS: TA = – 40°C to +85°C, VIN = +5V, C1 = C2 = 10µF (TCM828), C1 = C2 = 3.3µF

(TCM829) unless otherwise noted. Typical values are at TA = +25°C. (Note 2)

Symbol Parameter

Device

Test Conditions

Min

Typ

Max

Unit

IDD

Supply Current

TCM828

—

115

µA

TCM829

—

325

V

+

Supply Voltage Range

RLOAD = 10kΩ

1.5

—

5.5

V

FOSC

Oscillator Frequency

TCM828

6

—

20

kHz

TCM829

19

—

54.3

ROUT

Output Resistance

IOUT = 5mA

—

65

Ω

PIN DESCRIPTION

Pin No.

(5-Pin SOT-23A)

Symbol

Description

1

OUT

Inverting charge pump output.

2VIN

Positive power supply input.

3C

–

1

Commutation capacitor negative terminal.

4

GND

Ground.

5C1

+

Commutation capacitor positive terminal.

NOTE: 1. Capacitor contribution is approximately 20% of the output impedance [ESR = 1 / pump frequency x capacitance)].

NOTE: 2. All – 40

°C to +85°C specifications above are guaranteed by design.

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