TK65127 Просмотр технического описания (PDF) - Toko America Inc

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TK65127

STEP-UP VOLTAGE CONVERTER WITH VOLTAGE MONITOR

Toko America Inc  

TK651xx

ABSOLUTE MAXIMUM RATINGS

All Pins Except SW and GND .................................... 6 V

SW Pin ....................................................................... 9 V

Power Dissipation (Note 1) ................................ 400 mW

Storage Temperature Range ................... -55 to +150 °C

Operating Temperature Range ...................-20 to +80 °C

Junction Temperature ........................................... 150 °C

TK651xx ELECTRICAL CHARACTERISTICS

Over operating temperature range and supply voltage range, unless otherwise specified.

SYMBOL

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX UNITS

fOSC

Internal Oscillator Frequency

VIN = 1.3 V, IOUT = 0 mA

70

83

102

kHz

V

OUT(REG)

Regulation Threshold of V

OUT

T = 25 ° C

A

-5%

V

+3%

V

OUT

∆VOUT(LOAD) Load Regulation of VOUT(REG)

VIN = 1.3 V, IOUT = 0 to 4 mA

0

50

mV

∆VOUT(LINE) Line Regulation of VOUT(REG)

∆VIN = 0.25 V

-20

0

20

mV

DOSC

On-time Duty Ratio of Oscillator TA = 25 ° C

45

50

55

%

VLOI

VOUT During LOI Transition

TA = 25 ° C

-5% 0.87 VOUT +4%

V

Note 1: Derate at 0.8 mW/oC for operation above TA = 25 oC ambient temperature, when heat conducting copper foil path is maximized on the printed

circuit board. When this is not possible, a derating factor of 1.6 mW/ °C must be used.

Page 2

GENERAL CIRCUIT

I(VIN )

IB

V IN

L

V IN

GND

SW

LOI

GND 300 k Ω

V OUT

D

I(VOUT )

C

I OUT

V OUT

January 1999 TOKO, Inc.

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