TPS62000, TPS62001, TPS62002, TPS62003

TPS62004, TPS62005, TPS62006, TPS62007, TPS62008

HIGHEFFICIENCY STEPDOWN LOW POWER DCDC CONVERTER

SLVS294C − SEPTEMBER 2000 − REVISED SEPTEMBER 2003

3

POST OFFICE BOX 655303

functional block diagram

PFM/PWM

Control Logic

Current Limit

Logic

_

+

Compensation

Soft

Start

Slope Compensation

PFM/PWM

Mode Select

PFM/PWM

Comparator

Error Amplifier

_

+

Current

Sense

Driver

Shoot-Through

Logic

_

+

Undervoltage

Lockout

Bias Supply

10

Ω

_

+

Vref = 0.45 V

R2

R1

R1 + R2

≈ 1 MΩ

Power Good

Sync

+

Oscillator

_

+

Load Comparator

Current Sense

+

Offset

Antiringing

FB

N-Channel

Power MOSFET

P-Channel

Power MOSFET

L

PGND

EN

FB

PG

FC (See Note B)

VIN

GND

SYNC

ILIM

EN

(See

Note A)

NOTES: A. The adjustable output voltage version does not use the internal feedback resistor divider. The FB pin is directly connected to the

error amplifier.

B. Do not connect the FC pin to an external power source