Datasheet

TPS54326
www.ti.com SLVSA13E –OCTOBER 2009–REVISED JUNE 2012
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
MIN MAX UNIT
V
CC
Supply input voltage range 4.5 18 V
V
IN
Power input voltage range 2 18 V
V
BST
–0.1 24
V
BST
(vs SW1, SW2) –0.1 5.7
SS, PG –0.1 5.7
EN –0.1 18
V
I
Input voltage range V
V
O
, V
FB
–0.1 5.5
SW1, SW2 –1.8 18
SW1, SW2 (10 ns transient) –3 18
P
GND1
, P
GND2
–0.1 0.1
V
O
Output voltage range V
REG5
–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 –40 125 °C
ELECTRICAL CHARACTERISTICS
over operating free-air temperature range, V
CC
, V
IN
= 12V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY CURRENT
Operating - non-switching supply V
CC
current, T
A
= 25°C, EN = 5 V,
I
VCC
850 1300 μA
current V
FB
= 0.8 V
I
VCCSDN
Shutdown supply current V
CC
current, T
A
= 25°C, EN = 0 V 1.8 10 μA
LOGIC THRESHOLD
V
ENH
EN high-level input voltage EN 1.5 V
V
ENL
EN low-level input voltage EN 0.4 V
V
FB
VOLTAGE AND DISCHARGE RESISTANCE
V
FB
Voltage light load mode T
A
= 25°C, V
O
= 1.05 V, I
O
= 10 mA 771 mV
T
A
= 25°C, V
O
= 1.05 V 757 765 773
V
FB
Threshold voltage, continuous mode T
A
= 0°C to 85°C, V
O
= 1.05 V
(1)
753 777 mV
T
A
= -40°C to 85°C, V
O
= 1.05 V
(1)
751 779
I
VFB
Input current V
FB
= 0.8 V, T
A
= 25°C 0 ±0.1 μA
R
Dischg
V
O
discharge resistance EN = 0 V, V
O
= 0.5 V, T
A
= 25°C 50 100 Ω
V
REG5
OUTPUT
T
A
= 25°C, 6 V < V
CC
< 18 V,
V
VREG5
Output voltage 5.3 5.5 5.7 V
0 < I
VREG5
< 5 mA
V
LN5
Line regulation 6 V < V
CC
< 18 V, I
VREG5
= 5 mA 20 mV
V
LD5
Load regulation 0 mA < I
VREG5
< 5 mA 100 mV
I
VREG5
Output current V
CC
= 6 V, V
REG5
= 4 V, T
A
= 25°C 70 mA
MOSFET
R
DS(on)h
High side switch resistance 25°C, V
BST
- SW1, SW2 = 5.5 V 120 mΩ
R
DS(on)l
Low side switch resistance 25°C 70 mΩ
CURRENT LIMIT
I
ocl
Current limit L
OUT
= 1.5µH
(1)
3.5 4.1 5.5 A
THERMAL SHUTDOWN
Shutdown temperature
(1)
150
T
SDN
Thermal shutdown threshold °C
Hysteresis
(1)
25
(1) Specified by Design (not production tested).
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