RT9212 Ver la hoja de datos (PDF) - Richtek Technology

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RT9212

Dual 5V Synchronous Buck PWM DC-DC and Linear Power Controller

Richtek Technology 

RT9212

Preliminary

Parameter

Symbol

Test Conditions

Min Typ Max Units

V2 Error Amplifier (Internal Compensation)

DC Gain

-- 35 -- dB

Linear Regulator

DRV Driver Source

IDS

PWM Controller Gate Drivers

Upper Gate Source (UGATE1 and 2)

Upper Gate Sink (UGATE1 and 2)

RUGATE

RUGATE

BOOT = 10V

BOOT − VUGATE = 1V

VUGATE = 1V

Lower Gate Source (LGATE1 and 2)

RLGATE VCC − VLGATE = 1V

Lower Gate Sink (LGATE1 and 2)

RLGATE VLGATE = 1V

Upper Gate Rising Time (UGATE1 and 2) TR_UGATE CLoad = 3.3nF

Upper Gate Falling Time (UGATE1 and 2) TF_UGATE CLoad = 3.3nF

Lower Gate Rising Time (LGATE1 and 2) TR_LGATE CLoad = 3.3nF

Lower Gate Falling Time (LGATE1 and 2) TF_LGATE CLoad = 3.3nF

Dead Time

TDT

Protection

-- 100 -- mA

--

7

--

Ω

--

5

--

Ω

--

4

--

Ω

--

2

--

Ω

-- 70 -- ns

-- 50 -- ns

-- 50 -- ns

-- 32 -- ns

--

-- 100 ns

FB1 & FB2 Over-Voltage Trip

FB1 & FB2 Under-Voltage Trip

OCSET1 & OCSET2 Current Source

OCP Blocking Time

ΔFBOVT FB1 & FB2 Rising

125 137.5 -- %

ΔFBUVT FB1 & FB2 Falling

-- 62.5 75 %

IOCSET VOCSET1/SD, OCSET2/SD = 4.5V 34

40

46

μA

-- 320 540 ns

Logic-Low Voltage

OCSET/SD

Logic-High Voltage

Soft-Start Interval

Power Good

VIL

Shutdown

VIH

Enable

TSS

--

-- 0.2

V

2.0 --

--

--

4

-- ms

Upper Threshold

Lower Threshold

VPG+

VPG–

FB1 & FB2 Rising

FB1 & FB2 Rising

110 115 120 %

80 85 90 %

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.

www.richtek.com

6

DS9212-05 March 2007

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