RT9232_07 datasheet(4/14 Pages) RICHTEK

Il numero della parte	RT9232

Spiegazioni elettronici	Programmable Frequency Synchronous Buck PWM Controller

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Produttore elettronici	RICHTEK [Richtek Technology Corporation]

Homepage	http://www.richtek.com

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4 / 14 page

RT9232

4

DS9232-06 March 2007

www.richtek.com

Electrical Characteristics

(VCC = 12V, TA = 25

°C, Unless otherwise specified.)

Parameter

Symbol

Test Conditions

Min

Typ.

Max

Units

V

CC

Supply Current

Nominal Supply Current

ICC

EN=VCC, UGATE, LGATE open

--

3

--

mA

Power-On Reset (POR)

V

CC Rising Threshold

VCC_ON

VSENSE = 4.5V

8.4

--

10

V

Power On Reset Hysteresis

VSENSE = 4.5V

0.4

0.7

--

V

SENSE Rising Threshold for start up VSENSE_ON

--

1.5

2

V

Enable Input Threshold (ON)

VEN_ON

VSENSE = 4.5V

--

2

V

Enable Input Threshold (OFF)

VEN,_OFF

VSENSE = 4.5V

0.8

--

V

Oscillator

RT9232

fOSC

170

200

230

kHz

Free Running Frequency

Variation

6k < (RT to GND) < 200k

-20

20

%

Ramp Amplitude

Δ VOSC

--

2

--

VP-P

Reference

Error Amplifier Reference Voltage

VREF

0.792

0.8

0.808

V

To be continued

Absolute Maximum Ratings

(Note 1)

Supply Input Voltage, VCC, PVCC--------------------------------------------------------------------------- 15V

PHASE to GND

DC -------------------------------------------------------------------------------------------------------------------

−5V to 15V

< 200ns ------------------------------------------------------------------------------------------------------------

−10V to 30V

BOOT to PHASE ------------------------------------------------------------------------------------------------ 15V

BOOT to GND

DC -------------------------------------------------------------------------------------------------------------------

−0.3V to VCC+15V

< 200ns ------------------------------------------------------------------------------------------------------------

−0.3V to 42V

SS, FB, COMP, RT --------------------------------------------------------------------------------------------- 6V

Input, Output or I/O Voltage ----------------------------------------------------------------------------------- GND

−0.3V to VCC+ 0.3V

Package Thermal Resistance (Note 4)

SOP-14,

θJA ----------------------------------------------------------------------------------------------------- 100°C/W

Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------- 260

°C

Junction Temperature ------------------------------------------------------------------------------------------ 150

°C

Storage Temperature Range ----------------------------------------------------------------------------------

−65°C to 150°C

ESD Susceptibility (Note 2)

HBM (Human Body Mode) ----------------------------------------------------------------------------------- 2kV

MM (Machine Mode) ------------------------------------------------------------------------------------------- 200V

Recommended Operating Conditions

(Note 3)

Supply Input Voltage, VCC ------------------------------------------------------------------------------------ 12V

±10%

Supply Voltage to Drain of Upper MOSFETs, VIN ------------------------------------------------------- 3.3V, 5V to 12V

±10%

Ambient Temperature Range --------------------------------------------------------------------------------- 0

°C to 70°C

Junction Temperature Range --------------------------------------------------------------------------------- 0

°C to 125°C

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