NCP81147

www.onsemi.com

3

RF1

JP3

ETCH

1

2

CH1

Q3

1

RVFB1

RFB2

RSEN1

RNTC1

RFB3

CF1

ENABLE

VCCP

RS2

VOUT

CSEN1

CFB2

RS1

LOUT1

Q4

1

VIN

CBOOT1

+ COUT1

VCC

R2

R1

NCP81147

BOOT

4

COMP

8

LG

2

LX

3

UG

5

CSP

13

CSN/VO

12

VCCP

1

PGOOD

6

SYNC

7

FBG

11

FB

9

SYNC

PGOOD

Figure 2. Typical Application Circuit

ABSOLUTE MAXIMUM RATINGS

Rating

Symbol

Unit

Controller Power Supply Voltages to GND

VCC, VCCP

15

−0.3

V

Boost Supply Voltage Input

BOOT

35V wrt/GND

40 V <100 ns

wrt/GND

15 wrt/LX

−0.3

V

High−Side Driver Output

(Top Gate)

UG

35

40 V

≤ 50 ns

wrt/GND

15 wrt/LX

−0.3 wrt/LX

−5 V < 200 ns

V

Switching Node

(Bootstrap Supply Return)

LX

35

40 < 100 ns

−5

−10 V < 200 ns

V

Low−Side Driver Output

(Bottom Gate)

LG

15

−0.3

−5 V < 200 ns

V

All Other Pins

6

−0.3, −1 V < 1

ms

V

PGOOD

PGOOD

7

−0.3, −1 V < 1

ms

V

SYNC

SYNC

7

−0.3, −1 V < 1

ms

V

Current Sense Amplifier

CSP, CSN/VO with

10

−0.3, −1 V < 1

ms

V

Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality

should not be assumed, damage may occur and reliability may be affected.

*All signals referenced to GND unless noted otherwise.