Datasheet

Data Sheet ADP2442
Rev. 0 | Page 3 of 36
SPECIFICATIONS
V
IN
= 4.5 V to 36 V, T
J
= −40°C to +125°C, unless otherwise noted.
Table 1.
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
POWER SUPPLY
Input Voltage Range V
IN
4.5 36 V
Supply Current I
VIN
V
EN
= 1.5 V not switching 1.7 2 mA
Shutdown Current I
SHDN
V
EN
= AGND 10 15 µA
UVLO
Threshold V
UVLO
V
IN
falling 3.8 4 4.2 V
Hysteresis
200
mV
INTERNAL REGULATOR
Regulator Output Voltage V
CC
V
IN
= 5 V to 36 V 5 5.5 V
OUTPUT
Output Voltage Range V
OUT
0.6 0.9 × V
IN
V
Maximum Output Current I
OUT
1 A
Feedback Regulation Voltage
V
FB
T
J
= −40°C to +85°C
0.594
0.6
0.606
V
T
J
= −40°C to +125°C 0.591 0.6 0.609 V
Line Regulation 0.005 %/V
Load Regulation 0.05 %/A
ERROR AMPLIFIER
Feedback Bias Current I
FB_BIAS
V
FB
= 0.6 V 50 200 nA
Transconductance g
m
I
COMP
= ±20 µA 200 250 300 µA/V
Open-Loop Voltage Gain
1
A
VOL
65 dB
MOSFETS
High-Side Switch On Resistance
2
R
DS_H(ON)
BST − SW = 5 V 170 270 mΩ
Low-Side Switch On Resistance
2
R
DS_L(ON)
V
CC
= 5 V 120 180 mΩ
Leakage Current
I
LKG
V
EN
= AGND
1
25
μA
Minimum On Time
3
t
ON_MIN
All switching frequencies 50 65 ns
Minimum Off Time
4
t
OFF_MIN
165 175 ns
CURRENT SENSE
Current Sense Amplifier Gain G
CS
1.6 2 2.4 A/V
Hiccup Time f
SW
= 300 kHz to1 MHz 6 ms
Number of Cumulative Current-Limit Cycles
to Enter Hiccup Mode
8 Events
Peak Current Limit
I
CL
1.4
1.6
1.8
A
FREQUENCY
Switching Frequency Range f
SW
300 1000 kHz
Frequency Set Accuracy
FREQ pin = 308 kΩ
270
300
330
kHz
FREQ pin = 92.5 kΩ 900 1000 1100 kHz
Frequency Synchronization Range 300 1000 kHz
SOFT START
Soft Start Time t
SS
2 ms
PRECISION ENABLE
Input Threshold
V
EN(RISING)
1.15
1.20
1.25
V
Hysteresis V
EN(HYST)
100 mV
Leakage Current I
IEN_LEAK
V
IN
= V
EN
0.1 1 µA
Thermal Shutdown
Rising T
SD
150 °C
Hysteresis
T
SD(HYST)
25
°C