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SC2677

Features: 300kHz to 1MHz externally programmable frequency operation Soft Start and Enable function Power Good output provided Under voltage short circuit protection Phase-shifted switchers minimize ripple High efficiency operation, >90% Programmable output(s) as low as 0.5V Industrial temperat...

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SeekIC No. : 004485580 Detail

SC2677: Features: 300kHz to 1MHz externally programmable frequency operation Soft Start and Enable function Power Good output provided Under voltage short circuit protection Phase-shifted switchers minimize...

SC2677 Data Sheet

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Part Number:
SC2677
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

 300kHz to 1MHz externally programmable frequency operation
Soft Start and Enable function
Power Good output provided
Under voltage short circuit protection
Phase-shifted switchers minimize ripple
High efficiency operation, >90%
Programmable output(s) as low as 0.5V
Industrial temperature range
TSSOP-20 package
Bias voltage as low as 4.5V
Adjustable phase shift between channels


Application

 Graphics cards
Peripheral add-in card
Dual-Phase power supply
Power supplies requiring two outputs




Pinout

Connection Diagram


Specifications

Parameter Symbol Limits Units
VCC to GND VIN -0.3 to 15 V
PGND to GND   ± 1 V
BST1, BST2 to GND   -0.3 to 20 V
BSTC to GND   -0.3 to 20 V
-IN1, +/-IN2 to GND   7 V
COMP1, COMP2 to GND   7 V
DH1, DH2 to GND   -0.3 to 20 V
DL1, DL2 to GND -0.3 to BSTC + 0.3 V
-3 peak (50nS) (1) V
PWRGD to GND   VCC + 0.3 V
PHASING   7 V
SS/ENA to GND   -0.3 to 7 V
Thermal Resistance Junction to Case JC 17 °C/W
Thermal Resistance Junction to Ambient JA 90 °C/W
Operating Ambient Temperature Range TA 0 to 70 °C
Operating Junction Temperature Range TJ 0 to 125 °C
Storage Temperature Range TSTG -65 to +150 °C
Lead Temperature (Soldering) 10 sec TLEAD 300 °C



Description

The SC2677 is a versatile 2 phase, synchronous, voltage mode PWM controller that may be used in two distinct ways. First, the SC2677 is ideal for applications where point of use output power exceeds any single input power budget. Alternatively, the SC2677 can be used as a dual switcher. The SC2677 features a temperature compensated voltage reference, an under voltage lockout over current protection and internal level-shifted, highside drive circuitry.

In current sharing configuration, the SC2677 can produce a single output voltage from two separate voltage sources (which can be different voltage levels) while maintaining current sharing between the channels. Current sharing is programmable to allow loading each input supply as required by the application.

In dual switcher configuration, two feedback paths are provided for independent control of the separate outputs.The device will provide a regulated output from flexibly configured inputs (3.3V, 5V, 12V), provided 5V is present for VCC.The phasing between the two switchers is adjustable to minimize the input and output ripple.




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