Datasheet

1
1.025
1.05
1.075
1.1
V - Output Voltage - V
O
0 1 2 3 4 5
I - Output Current - A
O
V = 12 V
IN
V = 18 V
IN
V = 5 V
IN
0 5 10 15 20
EN - Input Voltage - V
0
5
10
15
20
25
30
35
40
45
50
EN - Input Current - Am
0
1
2
3
4
5
6
7
Ivccsdn - Shutdown Current - Am
-50 0 50 100 150
T - Junction Temperature C
J
- °
0
200
400
600
800
1000
1200
I - Supply Current - A
CC
m
-50 0 50 1 00 150
T - Junction Temperature C
J
- °
TPS54528
SLVSAY4C –JULY 2011–REVISED MARCH 2014 www.ti.com
Electrical Characteristics (continued)
over operating free-air temperature range, V
IN
= 12 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SOFT START
SS charge current V
SS
= 1 V 4.2 6 7.8 μA
I
SS
SS discharge current V
SS
= 0.5 V 0.1 0.2 mA
UVLO
Wake up V
REG5
voltage 3.45 3.75 4.05
UVLO UVLO threshold V
Hysteresis V
REG5
voltage 0.19 0.32 0.45
7.6 Timing Requirements - On-Time Timer Control
MIN TYP MAX UNIT
t
ON
On time V
IN
= 12 V, V
O
= 1.05 V 150 ns
t
OFF(MIN)
Minimum off time T
A
= 25°C, V
FB
= 0.7 V 260 330 ns
7.7 Typical Characteristics
VIN = 12 V, T
A
= 25°C (unless otherwise noted).
V
I
= 12 V
V
I
= 12 V
Figure 1. VIN Current vs Junction Temperature
Figure 2. VIN Shutdown Current vs
Junction Temperature
V
I
= 18 V
Figure 3. EN Current vs EN Voltage
Figure 4. 1.05-V Output Voltage vs Output Current
6 Copyright © 2011–2014, Texas Instruments Incorporated
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