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Part: ISL6226CA
Category:
Power Management
-> PWM Controllers
Description: Advanced PWM And Linear Power Controller For Portable Applications
Company: Intersil Corporation
Datasheet: Download ISL6226CA datasheet File size : 288 kB
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ISL6226
D a ta Sheet A u g us t 2002 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 rDS(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.
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, VIN, of 5.6V to 24V or from VCC of 5V · PWM Output Adjustable From 0.9V to 0.93*VIN · 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 rDS(ON) - Optional Current-Sense Resistor for More Precision · Separate Soft-Start For Both PWM and LDO
Ordering Information
PART NUMBER ISL6226 CA ISL6226EVAL1 TEMP. RANGE (oC) -10 to 85 Evaluation Board PA CKAGE 24 Ld SSOP PKG. NO. M 24.15
· 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
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
- 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
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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2002. All Rights Reserved
ISL6226
Absolute Maximum Ratings
Bias Voltage, Vcc. . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to + 7V Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +30.0V Phase and Isen Pins . . . . . . . . . . . . . . . . . . . . . GND-0.3V to +30.0V Boot and Ugate Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . + 35.0V BOOT with respect to PHASE . . . . . . . . . . . . . . . . . . . . . . . . . .+ 7.0V Imax for LINDR Pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70mA All other pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND -0.3V to 7V ESD Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Class 1
Thermal Information
Thermal Resistance (Typical, Note 1) JA (oC/W) SSOP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 Maximum Junction Temperature (Plastic Package) . . 150oC Maximum Storage Temperature Range . . . . . . . . . . -65oC to 150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . .300oC (SSOP - Lead Tips Only)
Recommended Operating Conditions
Bias Voltage, Vcc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+ 5.0 V ± 5 % Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . +5.6V to +24.0V Ambient Temperature Range . . . . . . . . . . . . . . . . . . . -10oC to 85oC Junction Temperature Range. . . . . . . . . . . . . . . . . . -10oC to 125oC
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE: 1. JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications Operating Conditions: Vcc = 5V, TA = -10oC to 85oC, Unless Otherwise Noted.
PARAMETER VCC SUPPLY Bias Current Bias Current Shut-down Current VCC UVLO Rising Vcc Threshold Falling Vcc Threshold Vcc Hysterises VIN Input Voltage Pin Current (Sink) Input Voltage Pin Current (Source) Shut-down Current OSCILL ATOR PWM Oscillator Frequency PWM Oscillator Frequency Ramp Amplitude, pk-pk Ramp Amplitude, pk-pk Ramp Offset PWM CONTROLLER REFERENCE AND SOFT START PWM Internal Reference Voltage PWM Soft-Start Threshold Reference Voltage Accuracy VREF VSOFT -2.0 0. 9 1. 5 +2.0 V V % Fc1 Fc2 VR1 VR2 VROFF VIN=3.5V -- 24V VIN 0.5V VIN= 16V VIN5V 255 510 300 600 2 1. 2 5 0. 5 345 690 kHz kHz V V V IVIN IVIN IVIN VIN pin connected to the input voltage source VIN pin connected to ground 10 -7 20 - 12 30 -17 1 µA µA µA 4.30 4.1 30 4 .65 4 . 45 500 V V mV IC C IC C ICCSN LGATE, UGATE Open, VSEN forced above regulation point (Fs = 300K Hz) LGATE, UGATE Open, VSEN forced above regulation point (Fs = 600K Hz) 1100 1100 5 25 µA µA µA SYMBOL TEST CONDITIONS MIN T YP MAX U NITS
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ISL6226
PARAMET ER Soft-Start Current During Start-up PWM CONVERTER Load Regulation VSEN pin bias current VOUT pin input impedance Under-Voltage Shut-Down Level Under Voltage Delay Over-Voltage Protection Over Voltage Delay PWM CONTROLLER GATE DRIVER Upper Drive Pull-Up Resistance Upper Drive Pull-Down Resistance Lower Drive Pull-Up Resistance Lower Drive Pull-Down Resistance POWER GOOD AND CONTROL FUNCTIONS Power Good Lower Threshold Power Good Higher Threshold PGOOD Leakage Current PGOOD Voltage Low EN- Low (Off) EN - High (On) FCCM -Hysteretic Operation Enabled LOW DROP OUT CONTROLLER FUNTIONS Linear Input Voltage Linear Input Voltage Linear Output Voltage Output Drive Current for NPN OverCurrent Feedback Voltage Under-Voltage Shut-Down Level Under-Voltage Delay REFERENCE AND SOFT START LDO Internal Reference Voltage LDO Soft-Start Threshold Reference Voltage Accuracy Soft-Start Current During Start-up POWER GOOD AND CONTROL FUNTIONS Power Good Lower Threshold Power Good Higher Threshold PGOOD Leakage Current PGOOD Voltage Low LINEN-Low (OFF) VPGVPG+ IPGLKG VPGOOD VoVREF VPULLUP = 5.5V IPGOOD = -4mA, VCC = 4.75V -15.5 10.5 -12 13.5 -9 1 6.5 1 .0 0 .5 0 .8 % % uA V V ISOFT VREF VSOFT -2.0 0. 8 1.5 5 +2.0 V V % µA Vin Vin LDOout I(DRV) out V(CS) VUV UVDLY Fraction of the set point; ~3µs noise filter 71 5.5 No External Passive Device With External Passive Device No External Passive Device Device 0.8 50 V cc Rating 100 74 77 8 4 .5 V mA mV % uS V VPGVPG+ IPGLKG Fraction of the set point; ~3µs noise filter Fraction of the set point; ~3µs noise filter VPULLUP = 5.5V IPGOOD = -4mA -13.5 7.4 2.0 Vcc/2 - 7. 5 1 3. 5 1 0 .5 0 .8 % % µA V V V V R2UGPUP R2UGPDN R2LGPUP R2LGPDN 6.2 2.5 6.2 1.3 8. 5 3. 0 8. 5 1. 6 1 3. 5 4 .7 1 3. 4 2 .7 IVSEN I VOUT VUV1 UV_DLY VOVP1 OVP_DLY Fraction of the set point; ~1µs noise filter Fraction of the set point; ~3µs noise filter 0.0mA < IVOUT1 < 5.0A; 5.0V < VIN < 24.0V -2.0 135 70 3 113.5 0. 5 80 150 +2.0 198 76 5 .5 118 2 .7 % nA kOhm % uS % uS SYMBOL ISOFT TEST CONDITIONS MIN T YP 5 MAX U NITS µA
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