RT9214GS Ver la hoja de datos (PDF) - Richtek Technology

Número de pieza

componentes Descripción

Lista de partido

RT9214GS

5V/12V Synchronous Buck PWM DC-DC Controller

Richtek Technology 

RT9214

Parameter

Symbol

Test Conditions

Oscillator

Free Running Frequency

Ramp Amplitude

Error Amplifier (GM)

fOSC

ΔVOSC

VCC = 12V

VCC = 12V

E/A Transconductance

gm

Open Loop DC Gain

AO

PWM Controller Gate Drivers (VCC = 12V)

Upper Gate Source

IUGATE

Upper Gate Sink

Lower Gate Source

Lower Gate Sink

Dead Time

Protection

RUGATE

ILGATE

RLGATE

TDT

VBOOT − VPHASE = 12V,

VUGATE − VPHASE = 6V

VBOOT − VPHASE = 12V,

VUGATE − VPHASE = 1V

VCC = 12V, VLGATE = 6V

VCC = 12V, VLGATE = 1V

FB Under-Voltage Trip

OC Current Source

Soft-Start Interval

Δ FBUVT

IOC

TSS

FB Falling

VPHASE = 0V

Min Typ Max Units

250 300 350 kHz

-- 1.5 -- VP-P

-- 0.2 -- ms

-- 90 -- dB

0.6 1

--

A

--

4

8

Ω

0.6 1

--

A

--

3

5

Ω

-- -- 100 ns

70 75 80 %

35 40 45 μA

-- 3.5 -- ms

Note 1. Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are for

stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the

operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended

periods may remain possibility to affect device reliability.

Note 2. Devices are ESD sensitive. Handling precaution recommended.

Note 3. The device is not guaranteed to function outside its operating conditions.

Note 4. θJA is measured in the natural convection at TA = 25°C on a low effective thermal conductivity test board of

JEDEC 51-3 thermal measurement standard.

DS9214-13 September 2007

www.richtek.com

5

Share Link: