Richtek RT8206LGQW, RT8206LZQW, RT8206MGQW, RT8206MZQW Schematic [ru]

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RT8206L/M

High Efficiency, Main Power Supply Controller for Notebook Computers

General Description

The RT8206L/M dual step-down, Switch-Mode PowerSupply (SMPS) controller generates logic-supply voltages in battery-powered systems. The RT8206L/M includes two Pulse-Width Modulation (PWM) controllers fixed at 5V/ 3.3V or adjustable from 2V to 5.5V. An optional external charge pump can be monitored through SECFB (RT8206L). This device also features a linear regulator providing a fixed 5V output. The linear regulator provides up to 70mA output current with automatic linear regulator bootstrapping to the BYP input. The RT8206L/M includes on-board power-up sequencing, the power good outputs, internal soft-start, and internal soft-discharge output that prevents negative voltages on shutdown.

A constant on-time PWM control scheme operates without sense resistors and provides 100ns response to load transients while maintaining a relatively constant switching frequency. The unique ultrasonic mode maintains the switching frequency above 25kHz, which eliminates noise in audio applications. Other features include DiodeEmulation Mode (DEM), which maximizes efficiency in light-load applications, and fixed frequency PWM mode, which reduces RF interference in sensitive application.

The RT8206L/M is available in a WQFN-32L 5x5 package.

Ordering Information

RT8206

Package Type

QW : WQFN-32L 5x5 (W-Type)

Lead Plating System

G : Green (Halogen Free and Pb Free) Z : ECO (Ecological Element with

Halogen Free and Pb free)

L : With SECFB

M : Without SECFB

Note :

Richtek products are :

`RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.

`Suitable for use in SnPb or Pb-free soldering processes.

Features

zWide Input Voltage Range 6V to 25V

zDual Fixed 5V/3.3V Outputs or Adjustable from 2V to 5.5V, 1.5% Accuracy

zSecondary Feedback Input Maintains Charge Pump Voltage (RT8206L)

zIndependent Enable and Power Good

z5V Fixed LDO Output : 70mA

z2V Reference Voltage ±1% : 50μA

zConstant ON-Time Control with 100ns Load Step Response

zFrequency Selectable via TON Setting

zRDS(ON) Current Sensing and Programmable Current Limit

z4700ppm/°C RDS(ON) Current Sensing

zSelectable PWM, DEM or Ultrasonic Mode

zInternal Soft-Start with Current Limiting and SoftDischarge

zHigh Efficiency Up to 97%

z5mW Quiescent Power Dissipation

zThermal Shutdown

zRoHS Compliant and Halogen Free

Applications

zNotebook and Sub-Notebook Computers

z3-Cell and 4-Cell Li+ Battery-Powered Devices

Copyright ©2012 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

DS8206L/M-07 June 2012

www.richtek.com

 

1

RT8206L/M

Marking Information

RT8206LGQW

 

RT8206MGQW

 

 

 

RT8206LGQW : Product Number

 

 

RT8206MGQW : Product Number

 

RT8206L

 

RT8206M

 

YMDNN : Date Code

 

YMDNN : Date Code

 

GQW

 

 

GQW

 

 

YMDNN

 

 

YMDNN

 

 

 

 

 

 

 

RT8206LZQW

 

RT8206MZQW

 

 

 

RT8206LZQW : Product Number

 

RT8206MZQW : Product Number

 

RT8206L

RT8206M

 

YMDNN : Date Code

YMDNN : Date Code

 

ZQW

 

ZQW

 

 

YMDNN

 

YMDNN

 

 

 

 

 

 

Pin Configurations

(TOP VIEW)

 

FB2

ILIM2

VOUT2

SKIP

PGOOD2

EN2

UGATE2

PHASE2

 

 

FB2

ILIM2

VOUT2

SKIP

PGOOD2

EN2

UGATE2

PHASE2

 

 

32

31

30

29

28

27

26

25

 

 

32

31

30

29

28

27

26

25

 

REF

1

 

 

 

 

 

 

24

BOOT2

REF

1

 

 

 

 

 

 

24

BOOT2

TON

2

 

 

 

 

 

 

23

LGATE2

TON

2

 

 

 

 

 

 

23

LGATE2

VCC

3

 

 

 

 

 

 

22

PGND

VCC

3

 

 

 

 

 

 

22

PGND

ENLDO

4

 

 

GND

 

 

21

GND

ENLDO

4

 

 

GND

 

 

21

GND

NC

5

 

 

 

 

20

SECFB

NC

5

 

 

 

 

20

NC

 

 

 

 

 

 

 

 

 

 

 

 

VIN

6

 

 

 

 

 

 

19

PVCC

VIN

6

 

 

 

 

 

 

19

PVCC

LDO

7

 

 

 

 

 

33

18

LGATE1

LDO

7

 

 

 

 

 

33

18

LGATE1

NC

8

 

 

 

 

 

 

17

BOOT1

NC

8

 

 

 

 

 

 

17

BOOT1

 

9

10

11

12

13

14

15

16

 

 

9

10

11

12

13

14

15

16

 

 

BYP

VOUT1

FB1

ILIM1

PGOOD1

EN1

UGATE1 PHASE1

 

 

BYP

VOUT1

FB1

ILIM1

PGOOD1

EN1

UGATE1 PHASE1

 

 

 

WQFN-32L 5x5

 

 

 

 

WQFN-32L 5x5

 

 

 

 

 

RT8206L

 

 

 

 

 

 

RT8206M

 

 

 

Copyright ©2012 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

www.richtek.com

DS8206L/M-07 June 2012

2

 

RT8206L/M

Typical Application Circuit

C1

 

 

 

 

 

 

 

 

 

R14

 

RT8206L/M

 

 

 

3.9

 

 

10µF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

 

VIN

UGATE2 26

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C18

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.1µF

 

BOOT2 24

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V

 

 

L1

 

6.8µH

OUT1

 

 

 

5V

 

 

 

C3

 

 

R5

220µF

 

 

 

 

 

 

C4

 

 

 

D1

 

C6

 

D2

 

0.1µF

 

 

 

 

 

D3

Q1

R4

0

15

UGATE1

 

 

 

R3

0

17

BOOT1

 

 

 

 

C2

 

 

 

 

0.1µF

 

16

PHASE1

 

 

 

Q3

 

 

18

LGATE1

 

 

 

 

 

 

 

 

 

9

BYP

 

 

 

 

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

 

VOUT1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.1µF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

VCC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C7

 

 

 

 

C9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.1µF

 

 

 

 

1µF

 

 

 

 

 

 

 

 

 

 

C8

D4

 

 

 

0.1µF

 

R11

 

 

 

 

 

 

 

 

200k

20

SECFB/NC

 

 

 

 

 

R12

11

FB1

 

 

39k

 

CP

C19

32

FB2

 

 

PVCC

19

PVCC

PHASE2 25

LGATE2 23 PGND 22

VOUT2 30

REF 1

PGOOD1 13

PGOOD2 28

EN1 14

EN2 27 ENLDO 4

ILIM1 12

ILIM2 31

TON 2

SKIP 29

 

 

 

 

V

 

 

 

 

IN

R9

 

C13

6V to 25V

 

C12

 

0

 

10µF

 

Q2

10µF

 

 

 

R8

0

 

 

 

 

 

C11

L2

V

 

 

0.1µF

4.7µH

 

 

 

 

OUT2

 

 

Q4

 

3.3V

 

 

R10

C17

 

 

 

220µF

 

 

 

 

 

 

 

C14

 

C15

R6

 

0.22µF

 

 

100k

PV

 

 

 

R13

CC

 

 

 

100k

PV

 

 

 

 

CC

5V Enable

 

ON

 

 

3.3V Enable

 

OFF

 

 

LDO Control

 

V

 

 

IN

 

R1

 

 

180k

 

 

R2

 

 

180k

 

Frequency Control

 

PWM/DEM/Ultrasonic

 

C16

GND 21, 33 (Exposed Pad)

7 LDO

R7

C10

Figure 1. Fixed Voltage Regulator

Copyright ©2012 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

DS8206L/M-07 June 2012

www.richtek.com

 

3

RT8206L/M

VOUT1

5V

C3 220µF

C23

C20 0.1µF

C1

 

 

 

 

 

 

 

 

 

R14

 

RT8206L/M

 

 

 

3.9

 

10µF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

VIN

UGATE2 26

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C18

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.1µF

 

BOOT2 24

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Q1

R4

0

15

UGATE1

 

 

 

 

 

R3

0

17

BOOT1

 

 

 

 

L1

 

C2

 

 

 

6.8µH

 

0.1µF

 

16

PHASE1

 

 

 

 

R5

Q3

 

 

18

LGATE1

C6 0.1µF

C8 0.1µF

C4

 

D1

C5

0.1µF

 

D2

 

D3

C7

0.1µF

 

D4

 

 

R11

 

200k

9 BYP

10 VOUT1

3 VCC C9 1µF

20 SECFB/NC

R12

PHASE2 25

LGATE2 23 PGND 22

VOUT2 30 FB2 32

REF 1

PGOOD1 13

PGOOD2 28

EN1 14

EN2 27 ENLDO 4

ILIM1 12

R9

 

 

0

Q2

 

 

R8

0

 

 

 

C11

 

 

0.1µF

 

 

Q4

C15

R6

0.22µF

 

100k

 

R13

 

100k

5V Enable

 

3.3V Enable

 

LDO Control

 

 

R1

 

180k

 

 

 

V

 

 

 

IN

C13

 

 

6V to 25V

C12

 

 

10µF

 

 

10µF

 

 

 

 

 

L2

 

 

 

4.7µH

 

 

V

 

 

 

OUT2

 

 

C17

3.3V

R10

 

 

 

220µF

C14

 

 

 

 

R17

 

C22

 

6.5k

 

 

 

 

 

R18

 

C21

 

 

0.1µF

 

10k

 

 

PV

 

 

 

CC

 

 

 

PV

 

 

 

CC

 

 

 

ON

 

 

 

OFF

 

 

 

V

 

 

 

IN

 

 

 

 

 

 

 

 

R15

CP

 

 

 

 

 

 

 

 

 

 

 

15k

 

 

 

 

 

 

R16

PV

 

 

 

 

 

 

 

 

 

 

 

10k

CC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

39k

C19

11 FB1

19 PVCC

 

C16

 

7 LDO

R7

C10

 

 

R2

ILIM2 31

180k

 

TON

2

Frequency Control

SKIP

29

PWM/DEM/Ultrasonic

 

 

 

GND 21, 33 (Exposed Pad)

Figure 2. Adjustable Voltage Regulator

Copyright ©2012 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

www.richtek.com

DS8206L/M-07 June 2012

4

 

Richtek RT8206LGQW, RT8206LZQW, RT8206MGQW, RT8206MZQW Schematic

RT8206L/M

Function Block Diagram

 

 

TON

SKIP

 

BOOT1

 

 

 

BOOT2

UGATE1

 

 

 

UGATE2

PHASE1

PVCC

 

 

PHASE2

 

 

 

PVCC

LGATE1

 

SMPS1

SMPS2

LGATE2

 

PWM Buck

PWM Buck

 

 

 

PGND

 

Controller

Controller

 

VOUT1

 

 

 

VOUT2

FB1

 

 

 

FB2

ILIM1

 

 

 

ILIM2

PGOOD1

 

 

 

PGOOD2

GND

SW Threshold

 

 

 

 

VCC

BYP

 

 

 

 

Internal

 

PVCC

 

 

Power-On

 

 

ENLDO

 

 

Logic

 

 

Sequence

 

 

EN1

 

 

 

 

 

 

Clear Fault Latch

 

 

 

EN2

 

 

 

 

LDO

 

Thermal

 

 

 

LDO

REF

REF

 

Shutdown

 

 

 

 

VIN

 

 

 

 

Function Block Diagram

 

 

TON

VIN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UGATE

VOUT

 

On-Time

 

TON

Q

R

TRIG

TOFF

 

 

Compute

 

1-Shot

1-Shot

 

 

 

 

 

 

 

Q

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TRIG

 

 

 

 

 

 

 

 

 

 

 

 

 

REF

-

+

 

-

Comp

 

 

 

 

 

+

-

 

+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LGATE

FB

 

 

Over-Voltage

 

 

 

 

VCC

 

 

+

 

 

Fault

 

 

 

 

 

1.1 x VREF

-

 

 

Latch

 

 

 

 

 

 

 

-

 

 

Blanking

 

+

ILIM

 

0.55 x VREF

+

 

 

Time

 

 

 

 

 

Under-Voltage

 

 

-

 

 

 

 

-

 

 

 

 

 

Current

 

 

0.9 x VREF

 

 

 

SS

Limit

 

 

+

 

 

 

+

 

 

 

 

 

 

 

 

Time

-

 

PGOOD

 

 

 

 

 

 

25kHz

 

+

PHASE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Detector

Zero

-

 

 

 

 

 

 

 

 

 

Detector

 

 

 

SKIP

 

PWM Controller (One Side)

 

 

 

 

Copyright ©2012 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

DS8206L/M-07 June 2012

 

 

www.richtek.com

5

RT8206L/M

Functional Pin Description

REF (Pin 1)

2V Reference Output. Bypass to GND with a 0.22μF capacitor. REF can source up to 50μA for external loads. Loading REF degrades FBx and output accuracy according to the REF load-regulation error.

TON (Pin 2)

Frequency Select Input. (VOUT1/VOUT2 switching frequency, respectively) :

TON = VCC, (200kHz / 300kHz)

TON = REF, (300kHz / 400kHz)

TON = GND, (400kHz / 500kHz)

VCC (Pin 3)

Analog Supply Voltage Input for the PWM Core. Bypass to GND with a 1μF ceramic capacitor

ENLDO (Pin 4)

LDO Enable Input. REF and LDO are enabled if ENLDO is within logic high level and disabled if ENLDO is less than the logic low level.

NC (Pin 5, 8)

No Internal Connection.

VIN (Pin 6)

Power Supply Input. VIN is used for the constant on-time PWM one shot circuits. VIN is also used to power the linear regulators. The linear regulators are powered by SMPS1 if VOUT1 is set greater than 4.66V and BYP is tied to VOUT1. Connect VIN to the battery input and bypass with a 1μF capacitor.

LDO (Pin 7)

Linear-Regulator Output. LDO can provide a total of 70mA external loads. The LDO regulates a fixed 5V output. When the BYP is within 5V switchover threshold, the internal regulator shuts down and the LDO output pin connects to BYP through a 1.5Ω switch. Bypass LDO output with a minimum of 4.7μF ceramic.

BYP (Pin 9)

Switchover Source Voltage Input for LDO.

VOUT1 (Pin 10)

SMPS1 Output Voltage Sense Input. Connect this pin to the SMPS1 output. VOUT1 is an input to the constant on-time-PWM one-shot circuit. It also serves as the SMPS1 feedback input in fixed-voltage mode.

FB1 (Pin 11)

SMPS1 Feedback Input. Connect FB1 to VCC or GND for fixed 5V operation. Connect FB1 to a resistive voltagedivider from VOUT1 to GND to adjust output from 2V to 5.5V.

ILIM1 (Pin 12)

SMPS1 Current Limit Adjustment. The GND − PHASE1 current-limit threshold is 1/10th the voltage seen at ILIM1 over a 0.5V to 2.5V range. There is an internal 5μA current source from VCC to ILIM1. The logic current limit threshold defaults to 100mV if ILIM1 is higher than (VCC − 1V).

PGOOD1 (Pin 13)

SMPS1 Power Good Open-Drain Output. PGOOD1 is low when the SMPS1 output voltage is more than 10% below the normal regulation point or during soft-start. PGOOD1 is in high impedance when the output is in regulation and the soft-start circuit has terminated. PGOOD1 is low in shutdown.

EN1 (Pin 14)

SMPS1 Enable Input. The SMPS1 will be enabled if EN1 is greater than the logic high level and disabled if EN1 is less than the logic low level. If EN1 is connected to REF, SMPS1 starts after SMPS2 reaches regulation (delay start). Drive EN1 below 0.8V to clear fault level and reset the fault latches.

UGATE1 (Pin 15)

High Side MOSFET Floating Gate-Driver Output for SMPS1. UGATE1 swings between PHASE1 and BOOT1.

Copyright ©2012 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

www.richtek.com

DS8206L/M-07 June 2012

6

 

RT8206L/M

PHASE1 (Pin 16)

Inductor Connection for SMPS1. PHASE1 is the internal lower supply rail for the UGATE1 high side gate driver. PHASE1 is the current-sense input for the SMPS1.

BOOT1 (Pin 17)

Boost Flying Capacitor Connection for SMPS1. Connect to an external capacitor according to the typical application circuits.

LGATE1 (Pin 18)

SMPS1 Synchronous-RectifierGate-drive Output. LGATE1 swings between PGND and PVCC.

PVCC (Pin 19)

Supply Voltage for Low Side MOSFET driver LGATEx. Connect a 5V power source to the PVCC pin (bypass with 1μF MLCC capacitor to PGND if necessary). There is an internal 10Ω connecting from PVCC to VCC. Make sure that both VCC and PVCC are bypassed with 1μF MLCC capacitors.

SECFB (Pin 20) (RT8206L)

Charge Pump Feedback Input. The SECFB is used to monitor the optional external charge pump. Connect a resistive voltage-divider from the charge pump output to GND to detect the output. If SECFB drops below the threshold voltage, an ultrasonic pulse occurs to refresh the external charge pump driven by LGATE1 or LGATE2

NC (Pin 20) (RT8206M)

No Internal Connection.

GND [Pin 21, 33 (Exposed Pad)]

Analog Ground for both SMPS and LDO. The exposed pad must be soldered to a large PCB and connected to GND for maximum power dissipation.

PGND (Pin 22)

Power Ground for SMPS Controller. Connect PGND externally to the underside of the exposed pad.

LGATE2 (Pin 23)

SMPS2 Synchronous-RectifierGate-drive Output. LGATE2 swings between PGND and PVCC.

BOOT2 (Pin 24)

Boost Flying Capacitor Connection for SMPS2. Connect this pin to an external capacitor according to the typical application circuits.

PHASE2 (Pin 25)

Inductor Connection for SMPS2. PHASE2 is the internal lower supply rail for the UGATE2 high side gate driver. PHASE2 is the current sense input for the SMPS2.

UGATE2 (Pin 26)

High Side MOSFET Floating Gate-Driver Output for SMPS2. UGATE2 swings between PHASE2 and BOOT2.

EN2 (Pin 27)

SMPS2 Enable Input. The SMPS2 will be enabled if EN2 is greater than the logic high level and be disabled if EN2 is less than the logic low level. If EN2 is connected to REF, the SMPS2 starts after the SMPS1 reaches regulation (delay start). Drive EN2 below 0.8V to clear fault level and reset the fault latches.

PGOOD2 (Pin 28)

SMPS2 Power Good Open-Drain Output. PGOOD2 is low when the SMPS2 output voltage is more than 10% below the normal regulation point or during soft-start. PGOOD2 is high impedance when the output is in regulation and the soft-start circuit has terminated. PGOOD2 is low in shutdown.

SKIP (Pin 29)

SMPS Operation Mode Control.

SKIP = GND : DEM Mode operation

SKIP = REF : Ultrasonic Mode operation

SKIP = VCC : PWM Mode operation.

Copyright ©2012 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

DS8206L/M-07 June 2012

www.richtek.com

 

7

RT8206L/M

VOUT2 (Pin 30)

SMPS2 Output Voltage Sense Input. Connect this pin to the SMPS2 output. VOUT2 is an input to the constant on-time-PWM one-shot circuit. It also serves as the SMPS2 feedback input in fixed-voltage mode.

ILIM2 (Pin 31)

SMPS2 Current-Limit Adjustment. The GND − PHASE2 current limit threshold is 1/10th the voltage seen at ILIM2 over a 0.5V to 2.5V range. There is an internal 5μA current source from VCC to ILIM2. The logic current limit threshold is default to 100mV value if ILIM2 is higher than (VCC − 1V).

FB2 (Pin 32)

SMPS2 Feedback Input. Connect FB2 to VCC or GND for fixed 3.3V operation. Connect FB2 to a resistive voltagedivider from VOUT2 to GND to adjust output from 2V to 5.5V.

Copyright ©2012 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

www.richtek.com

DS8206L/M-07 June 2012

8

 

 

 

 

RT8206L/M

Absolute Maximum Ratings (Note 1)

 

z VIN, ENLDO to GND --------------------------------------------------------------------------------------------

–0.3V to 30V

z PHASEx to GND

 

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

−0.3V to 30V

<20ns --------------------------------------------------------------------------------------------------------------

−8V to 38V

z BOOTx to PHASEx ---------------------------------------------------------------------------------------------

−0.3V to 6V

z VCC, ENx,

 

TON, PVCC, PGOODx, to GND

−0.3V to 6V

SKIP,

z LDO, FBx, VOUTx, SECFB, REF, ILIMx to GND --------------------------------------------------------

−0.3V to (VCC + 0.3V)

z UGATEx to PHASEx

 

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

−0.3V to (PVCC + 0.3V)

<20ns --------------------------------------------------------------------------------------------------------------

−5V to 7.5V

z LGATEx, BYP to GND

 

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

−0.3V to (PVCC + 0.3V)

<20ns --------------------------------------------------------------------------------------------------------------

−2.5V to 7.5V

z PGND to GND ----------------------------------------------------------------------------------------------------

−0.3V to 0.3V

z Power Dissipation, PD @ TA = 25°C

 

WQFN-32L 5x5 --------------------------------------------------------------------------------------------------

2.778W

z Package Thermal Resistance (Note 2)

 

WQFN-32L 5x5, θJA ---------------------------------------------------------------------------------------------

36°C/W

WQFN-32L 5x5, θJC --------------------------------------------------------------------------------------------

6°C/W

z Junction Temperature -------------------------------------------------------------------------------------------

150°C

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

260°C

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

−65°C to 150°C

z ESD Susceptibility (Note 3)

 

HBM (Human Body Model) ------------------------------------------------------------------------------------

2kV

Recommended Operating Conditions

(Note 4)

z Input Voltage, VIN -----------------------------------------------------------------------------------------------

6V to 25V

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

−40°C to 125°C

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

−40°C to 85°C

Copyright ©2012 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

DS8206L/M-07 June 2012

www.richtek.com

 

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