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ISL78233 Datasheet, PDF (5/18 Pages) Intersil Corporation – 3A and 4A Compact Synchronous Buck Regulators
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ISL78233, ISL78234
Absolute Maximum Ratings (Reference to GND)
VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 5.8V (DC) or 7V (20ms)
EN, FS, PG, SYNC, VFB . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to VIN + 0.3V
PHASE . . . . . . . . . . . . -1.5V (100ns)/-0.3V (DC) to 6.5V (DC) or 7V (20ms)
COMP, SS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 2.7V
ESD Rating
Human Body Model (Tested per AEC-Q100-002) . . . . . . . . . . . . . . . . 5kV
Machine Model (Tested per AEC-Q100-003) . . . . . . . . . . . . . . . . . . 300V
Charge Device Model (Tested per AEC-Q100-011) . . . . . . . . . . . . . . . 2kV
Latch-up (Tested per AEC-Q100-004, Class II, Level A) . . . . . . . . . . 100mA
Thermal Information
Thermal Resistance
JA (°C/W) JC (°C/W)
16 LD TQFN Package (Notes 4, 5) . . . . . . .
43
3.5
Operating Junction Temperature Range . . . . . . . . . . . . . .-55°C to +125°C
Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Pb-free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see TB493
Recommended Operating Conditions
VIN Supply Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7V to 5.5V
Load Current Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0A to 4A
Ambient 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:
4. 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. JC, “case temperature” location is at the center of the exposed metal pad on the package underside.
Electrical Specifications Unless otherwise noted, all parameter limits are established over the recommended operating conditions and
the typical specification are measured at the following conditions: TA = -40°C to +125°C, VIN = 3.6V, EN = VIN, unless otherwise noted. Typical values are
at TA = +25°C. Boldface limits apply across the operating temperature range, -40°C to +125°C.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
MAX
(Note 6) TYP (Note 6) UNITS
INPUT SUPPLY
VIN Undervoltage Lockout Threshold
VUVLO
Rising, no load
Falling, no load
2.5
2.7
V
2.2
2.45
V
Quiescent Supply Current
IVIN SYNC = GND, no load at the output
SYNC = GND, no load at the output and no
switches switching
45
µA
45
60
µA
Shutdown Supply Current
OUTPUT REGULATION
SYNC = VIN, FS = 2MHz, no load at the output
ISD SYNC = GND, VIN = 5.5V, EN = low
19
25
mA
3.8
10
µA
Reference Voltage
VFB Bias Current
Line Regulation
Soft-start Ramp Time Cycle
VREF
IVFB
VFB = 0.75V
VIN = VO + 0.5V to 5.5V (minimal 2.7V)
SS = SGND
0.593 0.600 0.606
V
0.1
µA
0.2
%/V
1
ms
Soft-start Charging Current
OVERCURRENT PROTECTION
ISS VSS = 0.1V
1.7
2.1
2.5
µA
Current Limit Blanking Time
tOCON
17
Clock
pulses
Overcurrent and Auto Restart Period
Positive Peak Current Limit
Peak Skip Limit
Zero Cross Threshold
tOCOFF
IPLIMIT
ISKIP
ISL78234, TA = +25°C
ISL78234, TA = -40°C to +125°C
ISL78233, TA = +25°C
ISL78233, TA = -40°C to +125°C
ISL78234, TA = +25°C
ISL78234, TA = -40°C to +125°C
ISL78233, TA = +25°C
ISL78233, TA = -40°C to +125°C
8
SS cycle
5.4
6.7
8.1
A
5.2
9
A
3.9
4.9
6
A
3.7
6.6
A
0.9
1.1
1.35
A
0.84
1.5
A
0.7
0.9
1.2
A
0.6
1.3
A
-275
375
mA
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5
FN8359.5
April 23, 2015
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