ISL78233 Datasheet, PDF (6/18 Pages) Intersil Corporation – 3A and 4A Compact Synchronous Buck Regulators

ISL78233, ISL78234
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: T_A = -40°C to +125°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 +125°C. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
MAX
(Note 6) TYP (Note 6) UNITS
Negative Current Limit
COMPENSATION
I_NLIMIT T_A = +25°C
T_A = -40°C to +125°C
-5.1
-2.8
-1.3
A
-6.0
-0.6
A
Error Amplifier Transconductance
COMP = VDD, Internal compensation
125
µA/V
External compensation
130
µA/V
Transresistance
RT 4A application
0.145 0.2
0.25
Ω
PHASE
P-Channel MOSFET ON-resistance
N-Channel MOSFET ON-resistance
PHASE Maximum Duty Cycle
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
100
%
PHASE Minimum On-time
SYNC = High
100
ns
OSCILLATOR
Nominal Switching Frequency
f_SW FS = VIN
FS with RS = 402kΩ
1700 2000 2350 kHz
420
kHz
FS with RS = 42.2kΩ
4200
kHz
SYNC Logic Low-to-high Transition Range
0.67 0.75 0.84
V
SYNC Hysteresis
0.17
V
SYNC Logic Input Leakage Current
PG
V_IN = 3.6V
3.7
5
µA
Output Low Voltage
IPG = 1mA
0.3
V
Delay Time (Rising Edge)
PG Pin Leakage Current
OVP PG Rising Threshold
Time from V_OUT reached regulation
PG = V_IN
0.5
1
2
ms
0.01
0.1
µA
0.80
V
UVP PG Rising Threshold
80
86
90
%
UVP PG Hysteresis
5.5
%
PGOOD Delay Time (Falling Edge)
6.5
µs
EN
Logic Input Low
0.4
V
Logic Input High
0.9
V
EN Logic Input Leakage Current
Pulled up to 3.6V
0.1
1
µA
Thermal Shutdown
Temperature Rising
150
°C
Thermal Shutdown Hysteresis
Temperature Falling
25
°C
NOTE:
6. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
Submit Document Feedback
6
FN8359.5
April 23, 2015