ISL6226 Datasheet, PDF (1/17 Pages) Intersil Corporation – Advanced PWM and Linear Power Controller for Portable Applications

®
Data Sheet
August 2002
ISL6226
FN9078.1
Advanced PWM and Linear Power
Controller for Portable Applications
The ISL6226 provides power control and protection for two
user selected output voltages required in high-performance
notebook PC applications. The IC integrates a fixed,
selectable frequency pulse-width-modulation (PWM)
controller and a 3A LDO linear regulator controller with
monitoring and protection circuitry in a single 24 lead SSOP
package.
The PWM controller regulates the battery input voltage to a
user selected output voltage. Synchronous converter and
hysteretic operation at light loads contribute to a high
efficiency over a wide range of input voltage and load
variation. Efficiency can be further enhanced by using the
lower MOSFET’s r_DS(ON) as the current sense element. Input
voltage feed-forward ramp modulation, current-mode control,
and internal feed-back compensation provide fast and stable
handling of input voltage load transients encountered in
advanced portable computer chip sets.
The internal linear regulator controller provides a user
selected high current output from an unregulated input with
user selected current limit.
Ordering Information
PART
NUMBER
ISL6226CA
TEMP. RANGE
(^oC)
PACKAGE PKG. NO.
-10 to 85 24 Ld SSOP M24.15
ISL6226EVAL1 Evaluation Board
Pinout
ISL6226 (SSOP)
TOP VIEW
VIN 1
PGOODL 2
PWMEN 3
OCSET 4
LINEN 5
VCC 6
LINDR 7
LINCS1 8
LINCS2 9
SSLIN 10
LINVS 11
GND 12
24 VOUT
23 VSEN
22 FPWM
21 PGOODP
20 _ISEN
19 BOOT
18 UGATE
17 PHASE
16 SSPWM
15 PVCC
14 LGATE
13 _PGND
Features
• Provides Two Regulated Voltages
- Linear Regulator, User Selected, Current Limited
- High Efficiency PWM Over Wide Line and Load Range
- Synchronous Buck Converter on PWM Output
- Hysteretic Operation at Light Load
• Dual Mode Operation:
- Directly From Battery Input, V_IN, of 5.6V to 24V or from
V_CC of 5V
• PWM Output Adjustable From 0.9V to 0.93*V_IN
• Low Drop-Out (LDO) Linear Regulator Operates from
Vout+0.5V to 24V
• LDO Output Adjustable
- From 0.8V to 3.8V at 0A to 3A for NPN Transistor
- From 0.8V to 3.0V at 0A to 3A for N-MOSFET
• 300/600kHz Switching Frequency Selectable
• Forced PWM Mode Control Option
• No Current-Sense Resistor Required on PWM Output
- Uses MOSFET’s r_DS(ON)
- Optional Current-Sense Resistor for More Precision
• Separate Soft-Start For Both PWM and LDO
• Separate Enable Pins for both PWM and LDO for
Advanced Configuration and Power Interface (ACPI)
Compatibility
• Input Under voltage Lock-Out (UVLO) Protection
• Excellent Dynamic Response
- Input Voltage Feed-Forward and Current-Mode Control
• Monitors Output Voltages and Provides PGOOD Status
• Thermal Shut-Down Protection
Applications
• _{Mobile PCs}
• Hand-Held Portable Instruments
• Other Devices and Appliances With up to 24V Input
Related Literature
• AN1013
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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