LM3485MM Datasheet, PDF (4/23 Pages) Texas Instruments – Hysteretic PFET Buck Controller

LM3485
SNVS178G – JANUARY 2002 – REVISED FEBRUARY 2013
Typical Performance Characteristics
Unless otherwise specified, T_J = 25°C
Quiescent Current
vs
Input Voltage
(FB = 1.5V)
Feedback Voltage
vs
Temperature
400
1.255
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350
300
250
200
150
100
4
110
Tj = -40qC
Tj = 25qC
Tj = 125qC
12
20
28
36
INPUT VOLTAGE (V)
Hysteresis Voltage
vs
Input Voltage
1.250
1.245
1.240
1.235
VIN=35V
VIN=12V
VIN=4.5V
1.230
1.225
-40 -20 0 20 40 60 80 100 120 140
JUNCTION TEMPERATURE (°C)
Hysteresis Voltage
vs
Temperature
14
12
105
TJ = 25qC
10
100
8
95
6
90
4
12
20
28
36
INPUT VOLTAGE (V)
Current Limit ADJ Current
vs
Temperature
6.5
4
-40 -20 0 20 40 60 80 100 120 140
JUNCTION TEMPERATURE (°C)
Current Limit One Shot OFF Time
vs
Temperature
12
6.0
VIN=12V
VIN=35V
5.5
VIN=4.5V
5.0
4.5
-40 -20 0 20 40 60 80 100 120 140
JUNCTION TEMPERATURE (qC)
11
10
VIN = 4.5V
9
VIN = 12V
8
-40 -20 0 20 40 60 80 100 120 140
JUNCTION TEMPERATURE (°C)
4
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