ISL9440B Datasheet, PDF (6/24 Pages) Intersil Corporation – Triple Step-Down PWM and Single Linear Controller with Programmable Soft-Start

ISL9440B, ISL9440C
Absolute Maximum Ratings
VCC_5V to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6V
VCC_5V Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100mA
VIN to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +28V
BOOT/UGATE to PHASE . . . . . . . . . . . . . -0.3V to VCC_5V + 0.3V
PHASE1,2,3 and ISEN1, 2, 3, to GND
. . . . . . . . . . . . . . . . . . . . .-5V (<100ns, 10µJ)/-0.3V (DC) to +28V
EN/SS1,EN/SS2, EN/SS3, FB1, FB2,
FB3, to GND. . . . . . . . . . . . . . . . . . . . . . -0.3V to VCC_5V + 0.3V
LDOFB, OCSET1, OCSET2, OCSET3,
LGATE1, LGATE2, LGATE3, to GND. . . -0.3V to VCC_5V + 0.3V
PGOOD, RST, G4 to GND . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6V
Thermal Information
Thermal Resistance (Typical Notes 4, 5) θ_JA(°C/W) θ_JC(°C/W)
32 Ld QFN Package. . . . . . . . . . . . . . .
31
2.3
Maximum Junction Temperature . . . . . . . . . . . . . . .-55°C to +150°C
Maximum Operating Temperature . . . . . . . . . . . . . . .-40°C to +85°C
Maximum Storage Temperature. . . . . . . . . . . . . . . .-65°C to +150°C
Pb-Free Reflow Profile. . . . . . . . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
NOTES:
4. 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.
5. 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. Refer to “Block Diagram” on page 3, “Typical
Application - ISL9440B” on page 4 and “Typical Application - ISL9440C” on page 5. V_IN = 5.6V to 24V, or
VCC_5V = 5V ±10%, C_VCC_5V = 4.7µF, T_A = -40°C to +85°C, Typical values are at T_A = +25°C.
PARAMETER
TEST CONDITIONS
MIN
MAX
(Note 11) TYP (Note 11) UNITS
V_IN SUPPLY
Input Voltage Range
5.6
12.0 24.0
V
Input Voltage Range
VCC_5V SUPPLY (Note 6)
V_IN = VCC_5V (Note 10)
4.5
5.0
5.6
V
Operation Voltage
4.5
5.0
5.6
V
Internal LDO Output Voltage
Maximum Supply Current of Internal LDO
V_IN SUPPLY CURRENT
Shutdown Current (Note 7)
V_IN > 5.6V, I_L = 60mA
V_IN = 12V
EN/SS1 = EN/SS2 = EN/SS3 = 0,
V_IN =12V. PGOOD and RST are
floating.
4.5
5.0
5.5
V
60
mA
75
110
µA
Operating Current (Note 8)
3
5
mA
REFERENCE SECTION
Internal Reference Voltage
Across specified temperature range
0.8
V
Reference Voltage Accuracy
Across specified temperature range
-1
+1
%
PWM CONTROLLER ERROR AMPLIFIERS
DC Gain (Note 9)
88
dB
Gain-BW Product (Note 9)
15
MHz
Slew Rate (Note 9)
2.0
V/µs
PWM REGULATOR
Switching Frequency (ISL9440B)
260
300 340
kHz
Maximum Duty Cycle (ISL9440B)
93
%
Minimum Duty Cycle (ISL9440B)
3
%
Switching Frequency (ISL9440C)
522
600 678
kHz
6
FN6799.3
June 24, 2010