ISL78235R5668 Datasheet, PDF (6/20 Pages) Intersil Corporation – Automotive 5A Synchronous Buck Regulator

ISL78235R5668
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 6, 7) . . . . . . .
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
V_IN Supply Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7V to 5.5V
Load Current Range (Continuous) . . . . . . . . . . . . . . . . . . . . . . . . . . 0A to 5A
Pulse Load Current (<100µs; <10% duty cycle) . . . . . . . . . . . . . . . . . . . . 8A
Ambient Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . -40^°C to +85^°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:
6. _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.
7. _JC, “case temperature” location is at the center of the exposed metal pad on the package underside.
Electrical Specifications Specification limits are established at the following conditions: T_A = -40°C to +85°C, V_IN = 3.6V, EN = V_IN,
unless otherwise noted. Typical values are at T_A = +25°C. Boldface limits apply across the operating temperature range -40°C to +85°C.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
MAX
(Note 8) TYP (Note 8) UNIT
INPUT SUPPLY
VIN Undervoltage Lockout Threshold
V_UVLO
Rising, no load
Falling, no load
2.5
2.7
V
2.20 2.45
V
Quiescent Supply Current
I_VIN SYNC = GND, no load at the output
SYNC = GND, no load at the output and no
switches switching
47
µA
47
60
µA
Shutdown Supply Current
OUTPUT REGULATION
SYNC = V_IN, f_SW = 2MHz, no load at the output
I_SD SYNC = GND, V_IN = 5.5V, EN = low
19
25
mA
4
10
µA
Reference Voltage
VFB Bias Current
Line Regulation
Soft-Start Ramp Time Cycle
V_REF
I_VFB
VFB = 0.75V
V_IN = V_O + 0.5V to 5.5V (minimal 2.7V)
SS = SGND
0.594 0.600 0.606
V
0.1
µA
0.2
%/V
1
ms
Soft-Start Charging Current
OVERCURRENT PROTECTION
ISS V_SS = 0.1V
1.7
2.1
2.5
µA
Current Limit Blanking Time
t_OCON
17
Clock
pulses
Overcurrent and Auto Restart Period
Positive Peak Current Limit
Peak Skip Limit
Zero Cross Threshold
t_OCOFF
I_PLIMIT
I_SKIP
T_A = +25°C
T_A = -40°C to +85°C
T_A = +25°C
T_A = -40°C to +85°C
10
10
1.30
1.30
-275
8
12
1.50
14
14.7
1.75
1.82
375
SS cycle
A
A
A
A
mA
Negative Current Limit
I_NLIMIT T_A = +25°C
T_A = -40°C to +85°C
-5.0
-2.8
-1.3
A
-5.0
-0.6
A
Submit Document Feedback
6
FN8769.1
January 21, 2016