Datasheet

TPS54425
www.ti.com SLVSA84C –AUGUST 2010– REVISED JULY 2011
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 –0.3 24
VBST(10 ns transient) –0.3 27
SS, PG –0.1 5.7
EN –0.1 18
V
I
Input voltage range V
VO, VFB –0.1 5.5
SW1, SW2 –1.8 18
SW1, SW2 (10 ns transient) –3 21
PGND1, PGND2 –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
= 12V (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 850 1300 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 2 V
V
ENL
EN low-level input voltage EN 0.4 V
V
FB
VOLTAGE AND DISCHARGE RESISTANCE
T
A
= 25°C, V
O
= 1.05 V, continuous mode 757 765 773
T
A
= 0°C to 85°C, V
O
= 1.05 V, continuous
753 777
V
FBTH
V
FB
threshold voltage mode
(1)
mV
T
A
= –40°C to 85°C, V
O
= 1.05 V, continuous
751 779
mode
(1)
I
VFB
V
FB
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, 6.0 V < V
IN
< 18 V,
V
VREG5
V
REG5
output voltage 5.3 5.5 5.7 V
0 < I
VREG5
< 5 mA
V
LN5
Line regulation 6.0 V < V
IN
< 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
IN
= 6 V, V
REG5
= 4 V, T
A
= 25°C 70 mA
MOSFET
R
dsonh
High side switch resistance 25°C, V
BST
- SW1,2 = 5.5 V 63 mΩ
R
dsonl
Low side switch resistance 25°C 55 mΩ
(1) Not production tested.
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