ZSPM4011

High Efficiency 1A Synchronous Buck Converter

Data Sheet

September 21, 2012

© 2012 Zentrum Mikroelektronik Dresden AG

— Rev. 1.03

All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the

prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.

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Parameter

Symbol

Condition

Min

Typ

Max

Unit

PG Open Drain Output

PG Release Timer

10

Ms

High-Level Output Leakage

0.5

µA

Low-Level Output Voltage

0.01

V

EN Input Voltage Thresholds

High Level Input Voltage

2.2

V

Low Level Input Voltage

0.8

V

Input Hysteresis

480

mV

Input Leakage

3.5

µA

-1.5

µA

Thermal Shutdown

Thermal Shutdown Junction

Temperature

TSD

Note: Guaranteed by design

150

170

°C

TSD Hysteresis

10

°C

1.5.

Regulator Characteristics

Parameter

Symbol

Condition

Min

Typ

Max

Unit

Switch Mode Regulator: L=4.7µH and C=2 x 22µF

Output Voltage Tolerance in

PWM Mode

PWM

2%

2%

V

Output Voltage Tolerance in

PFM Mode

PFM

1%

1%

3.5%

V

High Side Switch On

Resistance

(See table note 1)

180

mΩ

Low Side Switch On

Resistance

(See table note 1)

120

mΩ

Output Current

1

A

Over Current Detect

HS switch current

1.4

1.8

2.4

A

Feedback Reference

(Adjustable Mode)

0.886

0.9

0.914

V

Feedback Reference

Tolerance

-1.5

1.5

%

Soft Start Ramp Time

4

ms

PFM Mode FB Comparator

Threshold

1%

V