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High-Efficiency, Quad-Output, Main Power Supply Controllers for Notebook Computers

Package Information

Lead Count (#) 32
Pkg. Code LAZ
Pitch (mm) 0.5
Pkg. Type QFN
Pkg. Dimensions (mm) 5.00 x 5.00 x 0.90

Environmental & Export Classifications

Moisture Sensitivity Level (MSL) 3
Pb (Lead) Free Yes
ECCN (US) EAR99
HTS (US)

Product Attributes

Lead Count (#) 32
Carrier Type Tube
Moisture Sensitivity Level (MSL) 3
Pb (Lead) Free Yes
Pb Free Category Pb-Free 100% Matte Tin Plate w/Anneal-e3
Temp. Range -40 to +85°C
DDR Capable Yes
Input Voltage (Max) (V) 25
Input Voltage (Max) [Rail 1] (V) 25 - 25
Input Voltage (Min) (V) 5.5
Input Voltage (Min) [Rail 1] (V) 5.5
Length (mm) 5
Linear Output Yes
MOQ 600
Output Current (Max) [Rail 1] (A) 20
Output Current 1 (Max) (A) 20
Output Voltage (Max) [Rail 1] (V) 5.5
Output Voltage (Min) (V) 0.7
Output Voltage (Min) [Rail 1] (V) 0.7
Output Voltage 1 (Max) (V) 5.5
Output Voltage 2 (Max) 3.3 (Adj. 0.5 to 2.5)
Output Voltage 3 (Max) 3.3 or 5 (Adj. 0.7 to 4.5)
Output Voltage 4 (Max) 3.3
Outputs (#) 4
Parametric Category Buck Controllers (External FETs)
Pitch (mm) 0.5
Pkg. Dimensions (mm) 5.0 x 5.0 x 0.90
Pkg. Type QFN
Qualification Level Standard
Switching Frequency Range (Typical) (kHz) 200 - 500
Thickness (mm) 0.9
Topology [Rail 1] Buck
Width (mm) 5

Description

The ISL6236 dual step-down, switch-mode power-supply (SMPS) controller generates logic-supply voltages in battery-powered systems. The ISL6236 include two pulse-width modulation (PWM) controllers, 5V/3.3V and 1.5V/1.05V. The output of SMPS1 can also be adjusted from 0.7V to 5.5V. The SMPS2 output can be adjusted from 0V to 2.5V by setting REFIN2 voltage. An optional external charge pump can be monitored through SECFB. This device features a linear regulator providing 3.3V/5V, or adjustable from 0.7V to 4.5V output via LDOREFIN. The linear regulator provides up to 100mA output current with automatic linear-regulator bootstrapping to the BYP input. When in switchover, the LDO output can source up to 200mA. The ISL6236 includes on-board power-up sequencing, the power-good (POK) outputs, digital soft-start, and internal soft-stop output discharge that prevents negative voltages on shutdown. A constant ON-time PWM control scheme operates without sense resistors and provides 100ns response to load transients while maintaining a relatively constant switching frequency. The unique ultrasonic pulse-skipping mode maintains the switching frequency above 25kHz, which eliminates noise in audio applications. Other features include pulse skipping, which maximizes efficiency in light-load applications, and fixed-frequency PWM mode, which reduces RF interference in sensitive applications.