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PDF ISL6236 Data sheet ( Hoja de datos )
| Número de pieza | ISL6236 | |
| Descripción | Main Power Supply Controllers | |
| Fabricantes | Intersil Corporation | |
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®
Data Sheet
April 29, 2010
ISL6236
FN6373.6
High-Efficiency, Quad-Output, Main Power
Supply Controllers for Notebook
Computers
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.
Ordering Information
PART
NUMBER
(Note)
PART
MARKING
TEMP.
RANGE
(°C)
PACKAGE PKG.
(Pb-Free) DWG. #
ISL6236IRZA ISL6236 IRZ -40 to +100 32 Ld 5x5 QFN L32.5x5B
ISL6236IRZA-T* ISL6236 IRZ -40 to +100 32 Ld 5x5 QFN L32.5x5B
(Tape and
Reel)
*Please refer to TB347 for details on reel specifications.
NOTES:
1. These Intersil Pb-free plastic packaged products employ special
Pb-free material sets, molding compounds/die attach materials,
and 100% matte tin plate plus anneal (e3 termination finish, which
is RoHS compliant and compatible with both SnPb and Pb-free
soldering operations). Intersil Pb-free products are MSL classified
at Pb-free peak reflow temperatures that meet or exceed the Pb-
free requirements of IPC/JEDEC J STD-020.
2. For Moisture Sensitivity Level (MSL), please see device
information page for ISL6236. For more information on
MSL please see techbrief TB363.
Features
• Wide Input Voltage Range 5.5V to 25V
• Dual Fixed 1.05V/3.3V and 1.5V/5.0V Outputs or
Adjustable 0.7V to 5.5V (SMPS1) and 0V to 2.5V
(SMPS2), ±1.5% Accuracy
• Secondary Feedback Input (Maintains Charge Pump
Voltage)
• 1.7ms Digital Soft-Start and Independent Shutdown
• Fixed 3.3V/5.0V, or Adjustable Output 0.7V to 4.5V,
±1.5% (LDO): 200mA
• 3.3V Reference Voltage ±2.0%: 5mA
• 2.0V Reference Voltage ±1.0%: 50µA
• Constant ON-time Control with 100ns Load-Step
Response
• Frequency Selectable
• rDS(ON) Current Sensing
• Programmable Current Limit with Foldback Capability
• Selectable PWM, Skip or Ultrasonic Mode
• BOOT Voltage Monitor with Automatic Refresh
• Independent POK1 and POK2 Comparators
• Soft-Start with Pre-Biased Output and Soft-Stop
• Independent ENABLE
• High Efficiency - up to 97%
• Very High Light Load Efficiency (Skip Mode)
• 5mW Quiescent Power Dissipation
• Thermal Shutdown
• Extremely Low Component Count
• Pb-Free (RoHS Compliant)
Applications
• Notebook and Sub-Notebook Computers
• PDAs and Mobile Communication Devices
• 3-Cell and 4-Cell Li+ Battery-Powered Devices
• DDR1, DDR2 and DDR3 Power Supplies
• Graphic Cards
• Game Consoles
• Telecommunications
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2006-2008, 2010. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL6236
Electrical Specifications
No load on LDO, OUT1, OUT2, VREF3, and REF, VIN = 12V, EN2 = EN1 = VCC, VBYP = 5V, PVCC = 5V,
VEN_LDO = 5V, TA = -40°C to +100°C, unless otherwise noted. Typical values are at TA = +25°C. Boldface
limits apply over the operating temperature range, -40°C to +85°C. (Continued)
PARAMETER
CONDITIONS
MIN MAX
(Note 6) TYP (Note 6) UNITS
Undervoltage-Lockout Fault Threshold
Rising edge of PVCC
4.35 4.5
V
Falling edge of PVCC
3.9 4.05
LDO 5V Bootstrap Switch Threshold to BYP Rising edge at BYP regulation point
LDOREFIN = GND
4.53 4.68 4.83
V
LDO 3.3V Bootstrap Switch Threshold to
BYP
Rising edge at BYP regulation point
LDOREFIN = VCC
3.0 3.1 3.2
V
LDO 5V Bootstrap Switch Equivalent
Resistance
LDO to BYP, BYP = 5V, LDOREFIN > (VCC -1V) (Note 5)
0.7 1.5
Ω
LDO 3.3V Bootstrap Switch Equivalent
Resistance
LDO to BYP, BYP = 3.3V, LDOREFIN < 0.3V (Note 5)
1.5 3.0
Ω
VREF3 Output Voltage
No external load, VCC > 4.5V
3.235 3.300 3.365
V
No external load, VCC < 4.0V
3.220 3.300 3.380
V
VREF3 Load Regulation
VREF3 Current Limit
0 < ILOAD < 5mA
VREF3 = GND
10 mV
10 17 mA
REF Output Voltage
No external load
1.980 2.000 2.020
V
REF Load Regulation
REF Sink Current
0 < ILOAD < 50µA
REF in regulation
10
10
mV
µA
VIN Operating Supply Current
VIN Standby Supply Current
VIN Shutdown Supply Current
Quiescent Power Consumption
FAULT DETECTION
Both SMPSs on, FB1 = SKIP = GND, REFIN2 = VCC
VOUT1 = BYP = 5.3V, VOUT2 = 3.5V
VIN = 5.5V to 25V, both SMPSs off, EN LDO = VCC
VIN = 4.5V to 25V, EN1 = EN2 = EN LDO = 0V
Both SMPSs on, FB1 = SKIP = GND, REFIN2 = VCC,
VOUT1 = BYP = 5.3V, VOUT2 = 3.5V
25 50 µA
180 250
µA
20 30 µA
5 7 mW
Overvoltage Trip Threshold
FB1 with respect to nominal regulation point
+8 +11 +14
%
REFIN2 with respect to nominal regulation point
+12 +16 +20
%
Overvoltage Fault Propagation Delay
FB1 or REFIN2 delay with 50mV overdrive
10 µs
POK Threshold
FB1 or REFIN2 with respect to nominal output, falling -12 -9 -6 %
edge, typical hysteresis = 1%
POK Propagation Delay
Falling edge, 50mV overdrive
10 µs
POK Output Low Voltage
POK Leakage Current
ISINK = 4mA
High state, forced to 5.5V
0.2 V
1 µA
Thermal-Shutdown Threshold
+150
°C
Out-Of-Bound Threshold
FB1 or REFIN2 with respect to nominal output voltage
5
%
Output Undervoltage Shutdown Threshold FB1 or REFIN2 with respect to nominal output voltage
65
70
75
%
Output Undervoltage Shutdown Blanking
Time
From EN signal
10 20 30 ms
INPUTS AND OUTPUTS
FB1 Input Voltage
Low level
0.3 V
High level
VCC - 1.0
V
REFIN2 Input Voltage
OUT2 Dynamic Range, VOUT2 = VREFIN2
Fixed OUT2 = 1.05V
0.5 2.50 V
3.0 VCC - 1.1 V
Fixed OUT2 = 3.3V
VCC - 1.0
V
5 FN6373.6
April 29, 2010
5 Page 
ISL6236
Typical Performance Curves
Circuit of Figures 66, 67 and 68, no load on LDO, OUT1, OUT2, VREF3, and REF, VIN = 12V,
EN2 = EN1 = VCC, VBYP = 5V, PVCC = 5V, VEN LDO = 5V, TA = -40°C to +100°C, unless
otherwise noted. Typical values are at TA = +25°C. (Continued)
1.518
1.530
1.516
1.514
1.512
1.510
1.508
1.506
NO LOAD PWM
MID LOAD PWM
MAX LOAD PWM
1.525
1.520
1.515
1.510
1.505
NO LOAD PWM
MID LOAD PWM
MAX LOAD PWM
1.504
57
9 11 13 15 17 19 21 23 25
INPUT VOLTAGE (V)
FIGURE 15. VOUT1 = 1.5V OUTPUT VOLTAGE REGULATION
vs VIN (PWM MODE)
1.500
5 7 9 11 13 15 17 19 21 23 25
INPUT VOLTAGE (V)
FIGURE 16. VOUT1 = 1.5V OUTPUT VOLTAGE REGULATION
vs VIN (SKIP MODE)
3.340
3.335
3.330
NO LOAD PWM
3.325
3.320
3.315
MID LOAD PWM
MAX LOAD PWM
3.310
7 9 11 13 15 17 19 21 23 25
INPUT VOLTAGE (V)
FIGURE 17. VOUT2 = 3.3V OUTPUT VOLTAGE REGULATION
vs VIN (PWM MODE)
3.38
3.37
3.36
3.35
NO LOAD PWM
3.34
MAX LOAD PWM
3.33
3.32
3.31
MID LOAD PWM
3.30
7 9 11 13 15 17 19 21 23 25
INPUT VOLTAGE (V)
FIGURE 18. VOUT2 = 3.3V OUTPUT VOLTAGE REGULATION
vs VIN (SKIP MODE)
5.065
5.060
5.055
5.050
NO LOAD PWM
MAX LOAD PWM
MID LOAD PWM
5.045
5.040
7 9 11 13 15 17 19 21 23 25
INPUT VOLTAGE (V)
FIGURE 19. VOUT1 = 5V OUTPUT VOLTAGE REGULATION vs
VIN (PWM MODE)
11
5.14
5.12
5.10
5.08
5.06
MID LOAD PWM
NO LOAD PWM
5.04
5.02
7
MAX LOAD PWM
9 11 13 15 17 19 21 23 25
INPUT VOLTAGE (V)
FIGURE 20. VOUT1 = 5V OUTPUT VOLTAGE REGULATION vs
VIN (SKIP MODE)
FN6373.6
April 29, 2010
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ISL6236.PDF ] | |
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