ISL6545 Datasheet, PDF (4/16 Pages) Intersil Corporation – 5V or 12V Single Synchronous Buck Pulse-Width Modulation (PWM) Controller

ISL6545, ISL6545A
Absolute Maximum Ratings
Supply Voltage, V_CC . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to 15V
BOOT Voltage, V_BOOT . . . . . . . . . . . . . . . . . . . . GND - 0.3V to 36V
UGATE Voltage V_UGATE . . . . . . . . V_PHASE - 0.3V to V_BOOT + 0.3V
LGATE/OCSET Voltage, V_LGATE/OCSET GND - 0.3V to V_CC + 0.3V
PHASE Voltage, V_PHASE . . . . . . . . . .GND - 0.3V to V_BOOT + 0.3V
Upper Driver Supply Voltage, V_BOOT - V_PHASE . . . . . . . . . . . . .15V
Clamp Voltage, V_BOOT - V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . .24V
FB, COMP/SD Voltage. . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to 6V
ESD Rating
Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5kV
Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .150V
Charged Device Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0kV
Thermal Information
Thermal Resistance
θ_JA (°C/W) θ_JC (°C/W)
SOIC Package (Note 1) . . . . . . . . . . . .
95
N/A
DFN Package (Notes 2, 3) . . . . . . . . . .
44
5.5
Maximum Junction Temperature
(Plastic Package) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Maximum Storage Temperature Range . . . . . . . . . -65°C to +150°C
Pb-free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Operating Conditions
Supply Voltage, V_CC . . . . +5V ±10%, +12V ±20%, or 6.5V to 14.4V
Ambient Temperature Range
ISL6545C, ISL6545AC . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
ISL6545I, ISL6545AI . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C
Junction Temperature Range. . . . . . . . . . . . . . . . . .-40°C to +125°C
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:
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 with the component mounted on a high effective thermal conductivity test board in free air, with “direct attach” features. See
Tech Brief TB379 for details.
3. For θ_JC, the “case temp” location is the center of the exposed metal pad on the package underside.
4. Limits should be considered typical and are not production tested.
Electrical Specifications
Test Conditions: V_CC = 12V, T_J = 0 to +85°C, Unless Otherwise Noted. Parameters with MIN and/or MAX limits
are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization and
are not production tested.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
V_CC SUPPLY CURRENT
Input Bias Supply Current
POWER-ON RESET
I_VCC
V_CC = 12V; disabled
4
5.2
7
mA
Rising V_CC POR Threshold
V_CC POR Threshold Hysteresis
OSCILLATOR
V_POR
3.9
4.1
4.3
V
0.30
0.35
0.40
V
Switching Frequency
f_OSC
ISL6545C
ISL6545I
270
300
330
kHz
240
300
330
kHz
f_OSC
ISL6545AC
ISL6545AI
540
600
660
kHz
510
600
660
kHz
Ramp Amplitude (Note 4)
REFERENCE
ΔV_OSC
1.5
V_P-P
Reference Voltage Tolerance
ISL6545C
-1.0
-
+1.0
%
ISL6545I
-1.5
-
+1.5
%
Nominal Reference Voltage
ERROR AMPLIFIER
V_REF
0.600
V
DC Gain (Note 4)
GAIN
96
dB
Gain-Bandwidth Product (Note 4)
GBWP
20
MHz
Slew Rate (Note 4)
SR
9
V/µs
GATE DRIVERS
Upper Gate Source Impedance
R_UG-SRCh V_CC = 14.5V; I = 50mA
3.0
Ω
4
FN6305.5
April 29, 2010