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SP6137

Sipex
Part Number SP6137
Manufacturer Sipex
Description Wide Input / 900KHz Synchronous PWM Controller
Published Jun 7, 2005
Detailed Description ® SP6137 Wide Input, 900KHz Synchronous PWM Controller FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 2.5V to 20V Step Down Achieved U...
Datasheet PDF File SP6137 PDF File

SP6137
SP6137

Overview
® SP6137 Wide Input, 900KHz Synchronous PWM Controller FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 2.
5V to 20V Step Down Achieved Using Dual Input Small 10-Pin MSOP Package 2A to 15A Ouput Capability Highly Integrated Design, Minimal Components UVLO Detects Both VCC and VIN Short Circuit Protection with Auto-Restart On-Board 1.
5Ω sink (2Ω source) NFET Drivers Programmable Soft Start Fast Transient Response High Efficiency: Greater than 94% Possible A Synchronous Start-Up into a Pre-Charged Output VCC 1 GL 2 GND 3 VFB 4 COMP 5 10 BST SP6137 10 Pin MSOP 9 GH 8 SWN 7 SS 6 UVIN Now Available in Lead Free Packaging APPLICATIONS ■ 12V DPA ■ Communications Systems ■ Graphics Cards DESCRIPTION The SP6137 is a synchronous step-down switching regulator controller optimized for high efficiency.
The part is designed to be especially attractive for dual supply, 12V step down with 5V used to power the controller.
This lower VCC voltage minimizes power dissipation in the part.
The SP6137 is designed to drive a pair of external NFETs using a fixed 900kHz frequency, PWM voltage mode architecture.
Protection features include UVLO, thermal shutdown and output short circuit protection.
The SP6137 is available in the cost and space saving 10-pin MSOP.
TYPICAL APPLICATION CIRCUIT VIN 2.
5V -20V C1 22µF 16V FDS6676S 14.
5A, 6mΩ 1 2 3 8 7 6 5 C2 22µF 16V GND VCC = 5V @ 30mA QT 4 RLF 3.
0,5% CBST 1µF DBST MBR0530 1 VCC GL C1, C2 Ceramic 1210 X5R U1 BST 10 GH 9 R5 Bead 8 7 6 5 L1 SC5018-2R7M 2.
7µH @ 12A DCR=4.
30mΩ R3 221k, 1% UVIN R4 100k, 1% CVCC 10µF 6.
3V CVCC Ceramic 8050 X5R GND 3 2 3 4 SP6137 RZ3 4.
64k, 1% C3 47µF 6.
3V C4 47µF 6.
3V CZ3 220pF VOUT≤VIN 1.
8V @ 10A R1 68.
1k, 1% GND VFB COMP SWN 8 SS 7 UVIN 6 QB 4 0.
8V 5 SS CSS 47nF 1 2 3 FDS6676S 14.
5A, 6.
0mΩ CZ2 RZ2 GND2 C3, C4 Ceramic 1210 X5R R2 21.
5k, 1% 820pF 40.
2k, 1% CP1 CF1 100pF 56pF Date: 7/28/04 SP6137 Wide Input, 900KHz Synchronous PWM Controll © Copyright 2004 Sipex Corporation 1 ABSOLUTE MAXIMUM RATING...


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