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7

SBB SERIES

Single Output

Block Diagram

Input Filter

High-Side

Gate Drive

UVLO

PWM

High-Side

Switch

Low-Side

Switch

Output

Filter

Low-side

Gate drive

Current

Controller

Enable

Interface

Voltage

Controller

Sync.

Interface

Clock

Generator

Current

Sense

Power OK

Sense

Output

+Sense

Vadjust

Input

Enable

Sync. In

POK

Sync. Out

10

Case

Input

Return

8

9

11

12

3

5

Output

Return

6

7

4

Output

2

1

Fig 1: Typical Efficiency @-55°C - 1.2V Output (For Part Number SBB501R2S)

Typical Efficiency at -55 Degrees C, 1.2V Output

SBB501R2S

50%

55%

60%

65%

70%

75%

80%

85%

01

2345

678

9

10

11

12

13

14

Output Current, A

Vin = 4.5V

Vin = 5.0V

Vin = 5.5V