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ST1S10PUR Datenblatt(PDF) 2 Page - STMicroelectronics

Teilenummer ST1S10PUR
Bauteilbeschribung  3 A, 900 kHz, monolithic synchronous step-down regulator
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
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ST1S10PUR Datenblatt(HTML) 2 Page - STMicroelectronics

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Contents
ST1S10
2/26
Contents
1
Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.2
External components selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.2.1
Input capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.3
Output capacitor (VOUT > 2.5 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.4
Output capacitor (0.8 V < VOUT < 2.5 V) . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.5
Output voltage selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.6
Inductor (VOUT > 2.5 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.7
Inductor (0.8 V < VOUT < 2.5 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.8
Function operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.8.1
Sync operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.8.2
Inhibit function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.8.3
OCP (over-current protection) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.8.4
SCP (short circuit protection) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.8.5
SCP and OCP operation with high capacitive load . . . . . . . . . . . . . . . . 12
6
Layout considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.1
Thermal considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8
Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
9
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
10
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25


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