MIC3172
Features
- 1.25A, 65V Internal Switch Rating
- 3V to 40V Input Voltage Range
- Current Mode Operation
- Internal Cycle-by-Cycle Current Limit
- Low External Parts Count
- Operates in Most Switching Topologies
- 7 m A Quiescent Current (Operating)
- <1 μA Quiescent Current, Shutdown Mode
(MIC3172)
- TTL Shutdown patibility (MIC3172)
- External Frequency Synchronization (MIC2172)
- External Frequency Trim (MIC2172)
- Fits Most LT1172 Sockets (see Section 5.0,
Applications Information)
Applications
- Laptop/Palmtop puters
- Toys
- Handheld Instruments
- Off-Line Converter up to 50W (Requires External
Power Switch)
- Predriver for Higher Power Capability
- Master/Slave Configurations (MIC2172)
General Description
The MIC2172 and MIC3172 are plete 100 k Hz SMPS current mode controllers with internal 65V 1.25A power switches. The MIC2172 features external frequency synchronization or frequency adjustment, while the MIC3172 features an enable/shutdown control input.
Although primarily...
