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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List of Figures

Figure 2.1

Startup Response ................................................................................................................................ 10

Figure 2.2

100mA to 1A Load Step (Vcc= 12V, Vout =1.8V)................................................................................ 10

Figure 2.3

100mA to 2A Load (Vcc=12V, Vout = 1.8V) ........................................................................................ 10

Figure 2.4

100mA t0 1A Load Step (Vcc=12V, Vout = 3.3V)................................................................................ 10

Figure 2.5

100mA to 2A Load Step (Vcc=12V, Vout = 3.3V)................................................................................ 10

Figure 2.6

Line Transient Response (VCC=10V to 15V, Vout = 3.3V)................................................................. 10

Figure 2.7

Load Regulation................................................................................................................................... 11

Figure 2.8

Line Regulation (IOUT=1A) ................................................................................................................. 11

Figure 2.9

Efficiency vs. Output Current ( VOUT = 1.8V) ........................................................................................11

Figure 2.10 Efficiency vs. Output Current ( VOUT = 3.3V) ........................................................................................11

Figure 2.11 Efficiency vs. Output Current ( VOUT = 5V) ...........................................................................................11

Figure 2.12 Efficiency vs. Input Voltage (VOUT = 3.3V)............................................................................................11

Figure 2.13 Standby Current vs. Input Voltage....................................................................................................... 12

Figure 2.14 Standby Current vs. Temperature ....................................................................................................... 12

Figure 2.15 Output Voltage vs. Temperature.......................................................................................................... 12

Figure 2.16 Oscillator Frequency vs. Temperature (Iout=300mA) ......................................................................... 12

Figure 2.17 Quiescent Current vs. Temperature (No load) ................................................................................... 12

Figure 2.18 Input Current vs. Temperature (No load, No switching) ..................................................................... 12

Figure 3.1

ZSPM4011 Block Diagram .................................................................................................................. 13

Figure 3.2

Monitor and Control Logic Functionality .............................................................................................. 14

Figure 4.1

Typical Application for Adjustable Output Voltage............................................................................... 15

Figure 4.2

Typical Application for Fixed Output Voltage....................................................................................... 15

Figure 5.1

ZSPM4011 Package Drawing.............................................................................................................. 16

Figure 5.2

16 Lead 3x3mm QFN (top view).......................................................................................................... 17

List of Tables

Table 1.1

Absolute Maximum Ratings ................................................................................................................... 6

Table 1.2

Thermal Characteristics ......................................................................................................................... 6

Table 1.3

Recommended Operating Conditions ................................................................................................... 7

Table 1.4

Electrical Characteristics ....................................................................................................................... 7

Table 5.1

Pin Description, 16 lead, 3x3mm QFN ................................................................................................ 18