TSC TS650 Technical data

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TS650

Pin assignment:

1. Out

2. P.Gnd

3. CT

4. Gnd

5. FB

6. Vcc

7. Comp.

8. Enable

Buck Switching Regulator

Supply Voltage Range 3 V to 30V

Output Driving Current 500mA

Oscillator Frequency up to 100KHz

General Description

The TS650 is a monolithic buck switching regulator, it is consist of an voltage reference, error amplifier, current lim it ed s et by an external resistor, power forward modular controller and switching frequencies up to 100KHz are set by an external capacitor. Additionally, a chip enable feature is provided to power down reducing the supply current, and with a m inimum n umber of external components, the TS650 offer a simple and cost effective solutio n. The TS650 is offered in SOP-8 package.

Features

 Power forward control circuit  Operating voltage form 3V to 30V  Low standby current  Current limit adjustable  Output switch current up to 500mA  Variable oscillator frequency up to 100KHz (max)  Shut down control

 1.25V voltage reference Output

Pin Descriptions

Name Description

Output PWM Output

P.Gnd Power Ground

CT Oscillator Control

Gnd Ground

FB Voltage Feedback

Vcc Power Supply Comp. Feedback Compensation Enable ON/OFF control

Applications

 Charger  xD-ROM, xDSL product

 DC to DC converter s

Block Diagram

Ordering Information

Part No. Operating Temp. Package

TS650CS -20 ~ +85 oC SOP-8

TS650 1-4 2003/12 rev. A

Absolute Maximum Rating

Supply Voltage VCC 30 V Comparator Input Voltage Range VFB - 0.3 ~ 30 V Collector Output Voltage V Collector to Emitter Voltage V

30 V

C(SW)

30 V

CE(SW)

Output Switching Current ISW 500 mA Operating Junction Temperature Range TJ -20 ~ +125 oC Storage Temperature Range T Lead Temperature 1.6mm(1/16”) from case for 10Sec. T

-65 ~ +150 oC

STG

260

LEAD

Electrical Characteris t ic s

(VCC =5V, Ta =25 oC; unless otherwise specified.)

Parameter Symbol Test Conditions Min Typ Max Unit

Reference

Comp. Connect to FB

REF

temperature Line regulation RegLine VCC = 5V ~ 30V

Output switch (note1)

Saturation Voltage V

CE(SAT)

DC current gain HFE ISW =1A, Vce=0.5V 75 -Collector off-state current I

C(OFF)

Oscillator (OSC)

Frequency F Charge Current I Discharge Current I Discharge to Charge current ratio I

Current Limit Sense Voltage V

OSC

CHARGE

DISCHARGE DISCHARGE

/ I

CHARGE

IPK(SENSE)

ON/OFF driver control

ON driver voltage Von 4 5 V OFF driver voltage Voff 1 V ON driver current Ion

Total device

supply current ICC VCC = 5V ~ 30V, CT = 1nF,

Input bias current IIB Vin=0V

Note 1: Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient

temperature.

1.23 1.25 1.27 Ta= -20 oC ~ 25 oC - 0.1 1 Output voltage change with

Ta= 25

C ~ 85 oC - 0.2 1

5 mV

ISW =0.5A

1.0 1.2 V

Vce=30V 40 100 uA

CT = 1nF, Vpin5=0V 24 33 42 KHz

VCC = 5V ~ 30V 35 uA

VCC = 5V ~ 30V 220 uA

Pin7 to Vcc 6.5 --

DISCHARGE

= I

250 350 mV

CHARGE

= 3V ~ 30V

100 mA

3 5 mA pin7=Vcc, pin5>Vth, pin2=Gnd, remaining pins open

-400 nA

TS650 2-4 2003/12 rev. A

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