ISL78235 Datasheet, PDF (6/20 Pages) Intersil Corporation – 5A Automotive Synchronous Buck Regulator

ISL78235
Electrical Specifications Specification limits are established at the following conditions: T_A = -40°C to +105°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 +105°C. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
MAX
(Note 7) TYP (Note 7) UNITS
COMPENSATION
Error Amplifier Transconductance
COMP = VDD, Internal compensation
125
µA/V
External compensation
130
µA/V
Transresistance
RT
0.11 0.17 0.22
Ω
MOSFET
P-Channel ON-resistance
N-Channel ON-resistance
PHASE
V_IN = 5V, I_O = 200mA
V_IN = 2.7V, I_O = 200mA
V_IN = 5V, I_O = 200mA
V_IN = 2.7V, I_O = 200mA
26
35
50
mΩ
38
52
78
mΩ
5
11
20
mΩ
8
15
31
mΩ
PHASE Maximum Duty Cycle
100
%
PHASE Minimum On-time
SYNC = High
100
ns
OSCILLATOR
Nominal Switching Frequency
f_SW FS = V_IN
FS with RS = 402kΩ
1730 2000 2350
kHz
420
kHz
FS with RS = 42.2kΩ
4200
kHz
SYNC Logic Low to High Threshold
0.67 0.75 0.84
V
SYNC Logic Hysteresis
0.1
0.17
0.2
V
SYNC Logic Input Leakage Current
SYNC = 3.6V
3.7
5
µA
POWER-GOOD (PG)
Output Low Voltage
IPG = 1mA
0.3
V
PG Delay Time (Rising Edge)
PG Delay Time (Falling Edge)
Time from V_OUT reached regulation
0.5
1
2
ms
6.5
µs
PG Pin Leakage Current
OVP PG Rising Threshold
PG = V_IN
0.01
0.1
µA
0.80
V
UVP PG Rising Threshold
80
85
90
%
UVP PG Hysteresis
5.5
%
EN
Logic Input Low
0.4
V
Logic Input High
0.9
V
EN Logic Input Leakage Current
EN = 3.6V
0.1
1
µA
OVER-TEMPERATURE PROTECTION
Thermal Shutdown
Temperature Rising
150
°C
Thermal Shutdown Hysteresis
Temperature Falling
25
°C
NOTE:
7. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
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6
FN8713.2
July 1, 2015