650kHz ADAPTIVE COT STEP-DOWN CONVERTER
AP65355
3A, 18V, 650kHz ADAPTIVE COT STEP-DOWN CONVERTER
Description
The AP65355 is an adaptive constant on-time mode s...
Description
AP65355
3A, 18V, 650kHz ADAPTIVE COT STEP-DOWN CONVERTER
Description
The AP65355 is an adaptive constant on-time mode synchronous buck converter providing high efficiency, excellent transient response and high DC output accuracy for low-voltage regulation in digital TV and monitor.
The constant-on-time control scheme handles wide input/output voltage ratios and provides low external component count. The internal proprietary circuit enables the device to adopt both low equivalent series resistance (ESR) output capacitors, such as SP-CAP or POSCAP and ultra-low ESR ceramic capacitors.
The adaptive on-time control supports seamless transition between continuous conduction mode (CCM) at higher load conditions and discontinuous conduction mode (DCM) at lighter load conditions.
Pin Assignments
( Top View )
EN 1 FB 2 VREG5 3 SS 4 PG 5
Exposed Pad
11 PGND
10 VIN 9 VIN 8 BST 7 SW 6 SW
DCM allows AP65355 to maintain high efficiency at light load conditions. The AP65355 also features power good, programmable soft-start, UVLO, OTP, OVP and OCP to protect the circuit.
U-DFN3030-10
This IC is available in U-DFN3030-10 package.
Features
Fixed Frequency Emulated Constant On-time Control Good Stability Independent of the Output Capacitor ESR Fast Load Transient Response Synchronous Rectification: 90mΩ Internal High-side Switch and
57mΩ Internal Low-Side Switch Wide Input Voltage Range: 4.5V to 18V Output Voltage Range: 0.76V to 6V Power Good Indicator 3A Continuous Ou...
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