ZSPM4012B

High Efficiency 2A Synchronous Buck Converter

Data Sheet

April 4, 2013

© 2013 Zentrum Mikroelektronik Dresden AG

— Rev. 1.00

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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1.3.

Recommended Operating Conditions

Table 1.3

Recommended Operating Conditions

Parameter

Symbol

Min

Typ

Max

Unit

Input Operating Voltage

VCC

4.5

12

24

V

Bootstrap Capacitor

17.6

22

26.4

nF

Output Filter Inductor Typical Value

1)

3.76

4.7

5.64

µH

Output Filter Capacitor Typical Value

2)

33

44 (2 x 22)

µF

Output Filter Capacitor ESR

2

35

100

m



Input Supply Bypass Capacitor Typical Value

3)

8

10

µF

1)

current ripple.

2)

For best performance, a low ESR ceramic capacitor should be used.

3)

1.4.

Electrical Characteristics

Table 1.4

Electrical Characteristics

Parameter

Symbol

Condition

Min

Typ

Max

Unit

VCC Supply Voltage

Input Supply Voltage

VCC

4.5

24

V

Quiescent Current:

Normal Mode

5.2

mA

Quiescent Current:

Normal Mode, Non-switching

NOSWITCH

Non-switching

2.3

mA

Quiescent Current:

Disabled Mode

VCC = 12V, EN = 0V

5

10

µA

VCC Under Voltage Lockout

Input Supply Under Voltage

Threshold

VCC Increasing

4.1

4.3

4.5

V

Input Supply Under Voltage

Threshold Hysteresis

UV_HYST

650

mV

Oscillator

Oscillator Frequency

0.9

1

1.1

MHz