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SC1157, SC1157CSW, SC1158

Table of contents:
Info of SC1157
Info of SC1157CSW
Info of SC1158

SC1157, SC1157CSW, SC1158 Selling Leads, Datasheet

MFG:SC Package Cooled:SOP D/C:07/08+

SC1157, SC1157CSW, SC1158 Datasheet download

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Part Number: SC1157

MFG: SC

Package Cooled: SOP

D/C: 07/08+

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SC1157 General Description

The SC1157 is a low-cost, full featured, synchronous voltage-mode controller designed for use in single ended power supply applications where efficiency is of primary concern. Synchronous operation allows for the elimination of heat sinks in many applications. The SC1157 is ideal for implementing DC/DC converters needed to power advanced microprocessors such as Pentium^® ll (Klamath), in both single and multiple processor configurations. Internal level-shift, high-side drive circuitry, and preset shoot-thru control, allows for use of inexpensive n-channel power switches.

SC1157 features include an integrated 4-bit V_ID DAC, temperature compensated voltage reference, triangle wave oscillator, current limit comparator, frequency shift over-current protection, and an internally compensated error amplifier.

The SC1157 operates at a fixed 140KHz, providing an optimum compromise between efficiency, external component size, and cost.

SC1157 Maximum Ratings

Parameter	Symbol	Maximum	Units
V_CCto GND	V_IN	-0.3 to 7	V
PGND to GND		± 1	V
BST to GND		-0.3 to 15	V
Thermal Resistance Junction to Case	_{_JC}	30	°C/W
Thermal Resistance Junction to Ambient	_{_{_JA}}	130	°C/W
Operating Temperature Range	T_A	0 to +70	°C
Storage Temperature Range	T_STG	-65 to +150	°C
Lead Temperature (Soldering) 10 seconds	T_L	300	°C
ESD Rating (Human Body Model)	ESD	1.5	kv

SC1157 Features

•Low cost / full featured
•Synchronous operation
•4 Bit V_ID DAC programmable output (1% tolerance)
•Designed to meet Intel VRM8.2 (Pentium^®II)
•1.5% Reference

SC1157 Typical Application

•Pentium^® II Core Supply
•Multiple Microprocessor Supplies
•Voltage Regulator Modules (VRM)
•Programmable Power Supplies
•High Efficiency DC/DC Conversion

SC1157 Connection Diagram

SC1158 General Description

The SC1158 is a low-cost, full featured, synchronous voltage-mode controller designed for use in single ended power supply applications where efficiency is of primary concern. Synchronous operation allows for the elimination of heat sinks in many applications. The SC1158 is ideal for implementing DC/DC converters needed to power advanced microprocessors such as Pentium^® ll and K6-2. Internal level-shift, high-side drive circuitry, and preset shoot-thru control, allows for use of inexpensive N-channel power switches.

SC1158 features include an integrated 4-bit V_ID DAC, temperature compensated voltage reference, triangle wave oscillator, current limit comparator, frequency shift over-current protection, and an internally compensated error amplifier.

The SC1158 operates at a fixed 140KHz, providing an optimum compromise between efficiency, external component size, and cost.

SC1158 Maximum Ratings

Parameter	Symbol	Maximum	Units
V_CC to GND	V_IN	-0.3 to 7	V
PGND to GND		± 1	V
BST to GND		-0.3 to 15	V
Thermal Resistance Junction to Case	_JC	30	°C/W
Thermal Resistance Junction to Ambient	_JA	130	°C/W
Operating Temperature Range	T_A	0 to 70	°C
Storage Temperature Range	T_STG	-65 to +150	°C
Lead Temperature (Soldering) 10 sec	T_LEAD	300	°C
ESD Rating (Human Body Model)	ESD	1.5	kV

SC1158 Features

• Low cost / full featured
• Synchronous operation
• 4 Bit V_ID DAC programmable output (1% tolerance)
•Meets Intel VRM8.2 (Pentium^® II) high range
•=1.5% Reference

SC1158 Typical Application

•= Pentium^® II, K6-2 Core Supplies
•= Multiple Microprocessor Supplies
•= Voltage Regulator Modules (VRM)
•= Programmable Power Supplies
•= High Efficiency DC/DC Conversion

SC1158 Connection Diagram

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