iP1203 Power Block

04/08/05

iP1203 Simplified Application Schematic

Description

The iP1203 is a fully optimized solution for medium current synchronous buck applications requiring up to 15A.

It includes full function PWM control, with optimized power semiconductor chipsets and associated passives,

achieving high power density. Very few external components are required to create a complete synchronous

buck power supply.

power densities. iPOWIR technology eases design for applications where component integration offers benefits

in performance and functionality. iPOWIR technology solutions are also optimized internally for layout, heat

transfer and component selection.

• 5.5V to 13.2V Input Voltage

• 0.8V to 8V Output Voltage

• 15A Maximum Load Capability

• 200-400kHz Nominal Switching Frequency

• Over Current Hiccup

• External Synchronization Capable

• Overvoltage Protection

• Over Temperature Protection

• Internal Features Minimize Layout Sensitivity

• Very Small Outline 9mm x 9mm x 2.3mm

Features

Single Output Full Function

Synchronous Buck Power Block

Integrated Power Semiconductors,

PWM Control & Passives

iP1203

V

SS

FB

FB

CC

PGOOD

R

SYNC

OC

V

iP1203

V

SS

FB

FB

CC

PGOOD

R

SYNC

OC

V

V

V

OUT

IN

CC_bypass

T

SW

REF

V

V

S

IN

Pin Number

(See Page 18) Pin Name

Pin Description

1, 23

Input voltage connection pins

2,3,4,5,7,17,20,21

PGND

Power Ground pins

6

PWM controller power supply pin. Internally generated.

Requires a 2.2µf external bypass capacitor

8SS

Soft start pin. External capacitor provides soft start. Pulling soft start pin low

will disable the output. Cannot be cycled to unlatch OVP trip

9

CC

Output of the error amplifier

10

FB

Inverting input of the error amplifier

11

Output overvoltage sense pin.

12

datasheet

13

PGOOD

Power Good pin. Open collector, requires external pulll-up. If function not

needed, pin can be left floating

14

Non inverting input of the error amplifier (reference Voltage pin). Connect a

100pF cap from this pin to PGND.

15

SYNC

External Clock synchronization pin. Set free running frequency to 80% of

the SYNC frequency. When not in use, leave pin floating

16

OCSET

Output overcurrent trip threshold pin

18,19

Output inductor connection pins

22

Test pad, for internal use, short to VSW

24

PD- 96921C