RT8223P データシートの表示（PDF） - Richtek Technology

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RT8223P

High Efficiency, Main Power Supply Controller for Notebook Computer

Richtek Technology 

RT8223P

Pin No.

9

10

Pin Name

BOOT2

UGATE2

11

PHASE2

12

LGATE2

13

EN

14

SKIPSEL

16

VIN

17

VREG5

18

ENC

19

LGATE1

20

PHASE1

21

UGATE1

22

BOOT1

23

PGOOD

24

VOUT1

15, 25

(Exposed Pad)

GND

Pin Function

Boost Flying Capacitor Connection for SMPS2. Connect to an external capacitor

according to the typical application circuits.

Upper Gate Driver Output for SMPS2. UGATE2 swings between PHASE2 and

BOOT2.

Switch Node for SMPS2. PHASE2 is the internal lower supply rail for the

UGATE2 high side gate driver. PHASE2 is also the current-sense input for the

SMPS2.

Lower Gate Driver Output for SMPS2. LGATE2 swings between GND and

VREG5.

Master Enable Input. The REF/VREG5/VREG3 are enabled if it is within logic

high level and disabled if it is less than the logic low level.

Operation Mode Selectable Input.

Connect to VREG5 or VREG3 : Ultrasonic Mode

Connect to REF : PWM Mode

Connect to GND : DEM Mode

Supply Input for 5V/3.3V LDO and Feed Forward On-Time circuitry.

5V Linear Regulator Output. VREG5 is also the supply voltage for the lower gate

driver and analog supply voltage for the device.

SMPS Enable Input. Pull up to VREG3 or VREG5 to turn on both switch channels.

Short to GND to shutdown them.

Lower Gate Driver Output for SMPS1. LGATE1 swings between GND and

VREG5.

Switch Node for SMPS1. PHASE1 is the internal lower supply rail for the

UGATE1 high side gate driver. PHASE1 is also the current-sense input for the

SMPS1.

Upper Gate Driver Output for SMPS1. UGATE1 swings between PHASE1 and

BOOT1.

Boost Flying Capacitor Connection for SMPS1. Connect to an external capacitor

according to the typical application circuits.

Power Good Output for Channel 1 and Channel 2. (Logical AND).

Bypass Pin for SMPS1. Connect to the SMPS1 output to bypass efficient power

for VREG5 pin. VOUT1 is also for the SMPS1 output soft-discharge.

Ground for SMPS Controller. The exposed pad must be soldered to a large PCB

and connected to GND for maximum power dissipation.

DS8223P-01 June 2011

www.richtek.com

3

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