ISL6549 Datasheet, PDF (4/18 Pages) Intersil Corporation – Single 12V Input Supply Dual Regulator Synchronous Rectified Buck PWM and Linear Power Controller

ISL6549
Absolute Maximum Ratings
VCC12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to +14V
PVCC5, VCC5 . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to +7V
VCC5 (if used with external supply). . . . . . . . . . . GND - 0.3V to +6V
BOOT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to +27V
PHASE. . . . . . . . . . . . . . . . . . . . . . . . V_BOOT - 7V to V_BOOT + 0.3V
V_BOOT - V_PHASE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+7V
UGATE. . . . . . . . . . . . . . . . . . . . . . V_PHASE - 0.3V to V_BOOT + 0.3V
LGATE . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to PVCC5 + 0.3V
LDO_DR . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to VCC12 + 0.3V
FB, LDO_FB, COMP, FS_DIS . . . . . . . GND - 0.3V to VCC5 + 0.3V
ESD Classification
Human Body Model (Per JESD22-A114C) . . . . . . . . . . . . . . Class 2
Machine Model (Per EIA/JESD22-A115-A) . . . . . . . . . . . . . .Class B
Charge Device Model (Per JESD22-C101C). . . . . . . . . . . . Class IV
Thermal Information
Thermal Resistance
θ_JA (°C/W) θ_JC (°C/W)
SOIC Package (Note 1) . . . . . . . . . . . . 105
N/A
QFN Package (Notes 2, 3). . . . . . . . . .
52
14
QSOP Package (Note 1) . . . . . . . . . . . 110
N/A
Maximum Junction Temperature (Plastic Package) . . . . . . +150°C
Maximum Storage Temperature Range . . . . . . . . . -65°C to +150°C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . +300°C
(SOIC - Lead Tips Only)
Recommended Operating Conditions
External Supply Voltage on VCC5 . . . . . . . . . . . . . . . . . . +5.0V ±5%
Supply Voltage on VCC12 . . . . . . . . . . . . . . . . . . . . . . . +12V ±10%
Ambient Temperature Range (C). . . . . . . . . . . . . . . . . . 0°C to 70°C
Ambient Temperature Range (I) . . . . . . . . . . . . . . . . -40°C to +85°
Junction Temperature Range. . . . . . . . . . . . . . . . . . . 0°C to +125°C
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.
NOTES:
1. θ_JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
2. θ_JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See
Tech Brief TB379.
3. For θ_JC, the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications
Recommended Operating Conditions, unless otherwise noted. VCC12 = 12V
Temperature = 0 to +70°C (typical = +25°C) for Commercial; Temperature = -40 to + 85°C (typical = +25°C) for
Industrial. Refer to Block Diagram, Simplified Power System Diagram, and Typical Application Schematic.
PARAMETER
VCC SUPPLY CURRENT
Nominal Supply Current VCC12 (disabled)
Nominal Supply Current VCC5 (disabled)
Nominal Supply Current VCC12
(includes PVCC5 current)
Nominal Supply Current VCC5
Maximum PVCC5 Current Available (Note 5)
VCC12 to PVCC5 Current Limit (Note 5)
PVCC5 Voltage
POWER-ON RESET
Rising VCC5 Threshold
Falling VCC5 Threshold
Rising VCC12 Threshold
Falling VCC12 Threshold
OSCILLATOR AND SOFT-START
Switching Frequency
SYMBOL
I_{CC12 dis}
I_{CC5 dis}
I_CC12
I_CC5
I_PVCC5
I_PVCC5CL
V_PVCC5
F_OSC
TEST CONDITIONS
UGATE, LGATE and LDO_DR open;
FS_DIS = GND
UGATE, LGATE and LDO_DR open;
FS_DIS = GND (Note 4)
UGATE, LGATE and LDO_DR open;
F_OSC = 620kHz
UGATE, LGATE and LDO_DR open;
F_OSC = 620kHz
ISL6549C; No external load
ISL6549I; No external load
VCC12 = 12V
VCC12 = 12V
VCC5 = 5V
VCC5 = 5V
ISL6549C; R_{FS_DIS} = 45.3kΩ
ISL6549I; R_{FS_DIS} = 45.3kΩ
MIN
TYP MAX UNITS
2
3
mA
5
7.5
mA
12
18
mA
4
6
mA
100
mA
150
mA
4.95 5.25
5.8
V
4.85 5.25
5.8
3.7
4.2
4.5
V
3.3
3.8
4.1
V
8.8
9.5
10.0
V
7.0
7.5
8.0
V
540
620
700 kHz
525
620
700 kHz
4
FN9168.2
September 22, 2006