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RT9202CS

Single Synchronous Buck PWM DC-DC Controller

Richtek Technology 

RT9202

Absolute Maximum Ratings

z Supply Voltage VCC

7V

z BOOT & UGATE to GND

15V

z Input, Output or I/O Voltage

GND−0.3V ~ 7V

z Power Dissipation, PD @ TA = 25°C

SOP-8

0.625W

z Package Thermal Resistance

SOP-8, θJA

z Ambient Temperature Range

160°C/W

0°C ~ +70°C

z Junction Temperature Range

-40°C ~ +125°C

z Storage Temperature Range

-65°C ~ +150°C

z Lead Temperature (Soldering, 10 sec.)

260°C

CAUTION:

Stresses beyond the ratings specified in “Absolute Maximum Ratings” may cause permanent damage to the

device. This is a stress only rating and operation of the device at these or any other conditions above those

indicated in the operational sections of this specification is not implied.

Electrical Characteristics

(VCC = 5V, TA = 25°C, Unless otherwise specified.)

Parameter

Symbol

Test Conditions

VCC Supply Current / Regulated Voltage

Nominal Supply Current

Regulated Voltage from BOOT

Power-On Reset

ICC

UGATE, LGATE open

VCC

VBOOT = 12V

Rising VCC Threshold

VCC Threshold Hysteresis

Rising VOCSET Threshold

Reference

VOCSET = 4.5V

VOCSET1 = 4.5V

Reference Voltage

Oscillator

Free Running Frequency

Ramp Amplitude

Error Amplifier

∆ VOSC

DC gain

PWM Controller Gate Driver

Upper Drive Source

Upper Drive Sink

Lower Drive Source

Lower Drive Sink

RUGATE

RUGATE

RLGATE

RLGATE

BOOT= 12V

BOOT-VUGATE = 1V

VUGATE = 1V

VCC - VLGATE = 1V,

VLGATE = 1V

Min Typ Max Units

--

3

6 mA

5

6

7

V

3.85 4.1 4.35 V

0.3 0.5 0.7 V

0.8 1.25 2.0 V

0.784 0.8 0.816 V

250 300 350 KHz

-- 1.75 -- VP-P

32 35 38 dB

--

7

11

Ω

--

5 7.5

Ω

--

4

6

Ω

--

2

4

Ω

To be continued

DS9202-02 August 2002

www.richtek.com

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