DC-DC Controller
Single Buck Controller
uP1586
Dual Synchronous Buck Controller with 5V/3.3V 100mA LDOs for Notebook System Power
Datasheets PDF
General Description
The uP1586 is a dual synchronous buck controller with 5V/3.3V 100mA LDOs for notebook system power supply solution.
The uP1586 supports high efficiency, fast transient response and provides a combined POK signal. The ultrasonic mode maintains the switching frequency above audio frequency, which eliminates noise in audio applications. The proprietary RCOTTM technology provides fast transient response and high noise immunity.
The uP1586 has internal soft-start to control the inrush current. Other features include overcurrent protection, overvoltage protection, power-up sequencing, power OK output, and thermal shutdown. The uP1586 is available in the space saving package VQFN4x4-24L, specified from-40°C to 85°C.
Pin Configuration & Typical Application Circuit
uP1586P
uP1586Q
uP1586R
uP1586P/Q
uP1586R
Feature
- Wide Input Voltage Range: 6V to 26V
- Two Synchronous Buck Controllers
- Dual Fixed 5V/3.3V Outputs or Adjustable from 2V to 5.5V
- Selectable PWM, DEM and USM in Light Load
- Internal Soft-start and Soft-Discharge
- RCOTTM (Robust Constant On-Time) Control Architecture
- 4500ppm / °C RDS(ON) Current Sensing
- 100mA 5V/3.3V LDO with Switches
- Secondary FB Input Maintains Charge Pump Voltage (uP1586R)
- 2V ± 1% Reference Voltage Output
- Power OK Indicator
- OVP/UVP/OCP/OTP
- VQFN4x4-24L
- RoHS Compliant and Halogen Free
Application
- Notebook and Subnotebook System Power Supplies
- 3-4 Cell Li-Ion Battery-Power Devices
- Dual Output Supplies for DSP, Memory, Logic and Microprocessor