www.ti.com

1.5V

FB

COMP

+

+

−

15k

SEN

MODE

SENP

RZ

15k

Translator

Low

Voltage

Output

R LO

R HI

+

−

Converter Power Stage

1.5V

CZ

Soft

start

Error

Amplifier

To

VDD

To

GATE

RTN, COM, RSN

Part of TPS23750

RSP

C

BYP

To PWM

Comparator

80k

20k

ADDITIONAL USES OF SENP AND SEN

1.5V

FB

COMP

+

+

-

15k

SEN

MODE

SENP

15k

Translator

C

OUT

Low

Voltage

Output

R

LO

R

HI

+

-

Converter Power Stage

Soft

start

To current

comparator

Error

Amplifier

To

V

DD

To

GATE

RTN, COM, RSN

Part of TPS23750

RSP

C

BYP

To PWM

Comparator

TPS23750

TPS23770

SLVS590A – JULY 2005 – REVISED AUGUST 2005

APPLICATION INFORMATION (continued)

Figure 34. Buck Converter Configuration

The level translator inputs, SENP and SEN, are not limited to the buck application shown in Figure 34. They may

about 22.5

µA of current, while the SEN pin draws less than 1 µA. The SENP current can cause a small offset in

the output voltage if connected to the center tap of an output voltage divider. If necessary, the offset can be

telecom application that requires a voltage greater than battery ground.

Figure 35. Buck-Boost Configuration Example

21