RT8525 datasheet(3/10 Pages) RICHCO

Part #	RT8525

Description	Boost Controller with Dimming Control

Download	10 Pages

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Manufacturer	RICHCO [Richco, Inc.]

Direct Link	http://www.richco-inc.com

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RT8525

DS8525-01 March 2012

www.richtek.com

©

is a registered trademark of Richtek Technology Corporation.

Electrical Characteristics

(VIN = 21V, VOUT = 50V, TA = 25

°C, unless otherwise specified)

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Input Power Supply

Quiescent Current

IQ

No Switching, RSW = 56kΩ

--

1.3

2

mA

Shutdown Current

ISHDN

VEN = 0V

--

10

--

μA

Under Voltage Lockout

Threshold

VUVLO

VIN Rising

--

3.8

--

V

Under Voltage Lockout

Hysteresis

ΔVUVLO

--

500

--

mV

12V Regulator

13.5V < VIN < 16V, 1mA < ILOAD < 100mA

16V < VIN < 20V, 1mA < ILOAD< 50mA

Regulator Output Voltage

VDC

20V < VIN < 29V, 1mA < ILOAD< 20mA

11.4

12

12.6

V

Dropout Voltage

VDROP

VIN − VDC, VIN = 12V, ILOAD = 100mA

--

500

--

mV

Short-Circuit Current Limit

ISC

VDC Short to GND

--

270

--

mA

Control Input

Logic-High VIH

2

--

EN Threshold

Voltage

Logic-Low VIL

--

0.8

V

EN Sink Current

IIH

VEN = 5V

--

5

--

μA

Sleeping

Mode

tSLEEP

RSW = 56kΩ, EN = L, 12V Regular Shutdown 55

--

ms

Shutdown Delay

Shutdown

Mode

tSHDN

RSW = 56kΩ, EN = L, IC Shutdown

110

--

ms

Absolute Maximum Ratings

(Note 1)

VIN to GND ------------------------------------------------------------------------------------------------------------------

−0.3V to 32V

VDC, DRV, FAULT to GND-----------------------------------------------------------------------------------------------

−0.3V to 13.2V

EN, COMP, SS, FSW, FB, OOVP, ISW, PWMI to GND ---------------------------------------------------------

−0.3V to 6V

Power Dissipation, PD @ TA = 25

°C

SOP-14 ---------------------------------------------------------------------------------------------------------------------- 1.000W

Package Thermal Resistance (Note 2)

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 3)

HBM -------------------------------------------------------------------------------------------------------------------------- 2kV

MM ---------------------------------------------------------------------------------------------------------------------------- 200V

Recommended Operating Conditions

(Note 4)

Supply Input Voltage, VIN ----------------------------------------------------------------------------------------------- 4.5V to 29V

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

−40°C to 125°C

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

−40°C to 85°C

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