Datasheet

TPS54328
www.ti.com SLVSAN2C –NOVEMBER 2010–REVISED NOVEMBER 2012
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
MIN MAX UNIT
V
IN
Supply input voltage range 4.5 18 V
VBST –0.1 24
VBST (10 ns transient) –0.1 27
VBST(vs SW) –0.1 5.7
SS –0.1 5.7
V
I
Input voltage range EN –0.1 18 V
VFB –0.1 5.5
SW –1.8 18
SW (10 ns transient) –3 21
GND –0.1 0.1
V
O
Output voltage range VREG5 –0.1 5.7 V
I
O
Output Current range I
VREG5
0 10 mA
T
A
Operating free-air temperature –40 85 °C
T
J
Operating junction temperature –40 150 °C
ELECTRICAL CHARACTERISTICS
over operating free-air temperature range , V
IN
= 12 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY CURRENT
V
IN
current, T
A
= 25°C, EN = 5 V,
I
VIN
Operating - non-switching supply current 800 1200 μA
V
FB
= 0.8 V
I
VINSDN
Shutdown supply current V
IN
current, T
A
= 25°C, EN = 0 V 1.8 10 μA
LOGIC THRESHOLD
V
ENH
EN high-level input voltage EN 1.6 V
V
ENL
EN low-level input voltage EN 0.45 V
V
FB
VOLTAGE AND DISCHARGE RESISTANCE
T
A
= 25°C, V
O
= 1.05 V, I
O
= 10 mA, Eco-
772 mV
mode™ operation
V
FBTH
V
FB
threshold voltage
T
A
= 25°C, V
O
= 1.05 V, continuous mode
749 765 781 mV
operation
I
VFB
V
FB
input current V
FB
= 0.8 V, T
A
= 25°C 0 ±0.1 μA
V
REG5
OUTPUT
T
A
= 25°C, 6.0 V < V
IN
< 18 V,
V
VREG5
V
REG5
output voltage 5.2 5.5 5.7 V
0 < I
VREG5
< 5 mA
V
LN5
Line regulation 6 V < V
IN
< 18 V, I
VREG5
= 5 mA 25 mV
V
LD5
Load regulation 0 mA < I
VREG5
< 5 mA 100 mV
I
VREG5
Output current V
IN
= 6 V, V
REG5
= 4.0 V, T
A
= 25°C 60 mA
MOSFET
R
DS(on)h
High side switch resistance 25°C, V
BST
- SW = 5.5 V 100 mΩ
R
DS(on)l
Low side switch resistance 25°C 70 mΩ
CURRENT LIMIT
I
ocl
Current limit L out = 1.5 μH
(1)
, T
A
= -20ºC to 85ºC 3.5 4.2 5.7 A
(1) Not production tested.
Copyright © 2010–2012, Texas Instruments Incorporated 3
Product Folder Links :TPS54328