RT8525D datasheet(5/12 Pages) RICHTEK

Part #	RT8525D

Description	Current Mode Boost Controller

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Manufacturer	RICHTEK [Richtek Technology Corporation]

Direct Link	http://www.richtek.com

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5

RT8525D

DS8525D-00 June 2012

www.richtek.com

©

is a registered trademark of Richtek Technology Corporation.

Note 1.

Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are

stress ratings only, and 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 may

affect device reliability.

Note 2.

θJA is measured at TA = 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7. θJC is

measured at the exposed pad of the package.

Note 3.

Devices are ESD sensitive. Handling precaution is recommended.

Note 4.

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

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

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

Boost Controller

Switching Frequency

fSW

RSW = 56kΩ

--

200

--

kHz

Minimum On-Time

tMON

--

250

--

ns

Maximum Duty

DMAX

Switching

90

--

%

Feedback Voltage

VFB

--

1.25

--

V

Slope Compensation

Peak Magnitude of Slope

Compensation Current

ISLOPE, PK

--

50

--

μA

Soft-Start

Soft-Start Current

ISS

3

4

5

μA

Gate Driver

RDS(ON)_N ISINK = 100mA (N-MOSFET)

--

1

--

Ω

DRV On-Resistance

RDS(ON)_P

ISOURCE = 100mA (P-MOSFET)

--

1.5

--

Ω

Peak Sink Current

IPEAKsk

CLOAD = 1nF

--

2.2

--

A

Peak Source Current

IPEAKsr

CLOAD = 1nF

--

2.55

--

A

Rise Time

tr

CLOAD = 1nF

--

6

--

ns

Fall Time

tf

CLOAD = 1nF

--

5

--

ns

Protection Function

OCP Threshold

VOCP

Including Slope Compensation

Magnitude

--

0.4

--

V

VOUT OVP Threshold

VOVP

--

2.5

--

V

VOUT UVP Threshold

VUVP

--

0.1

--

V

Thermal Shutdown

Temperature

TSD

--

150

--

°C

Thermal Shutdown Hysteresis

ΔTSD

--

50

--

°C

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