Datasheet

TPS54226
www.ti.com SLVSA14E –OCTOBER 2009–REVISED JULY 2011
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
V
CC
current, T
A
= 25°C, EN = 5 V,
I
VCC
Operating - non-switching supply current 800 1200 μA
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
VFB voltage light load mode, T
A
= 25°C,
771
V
O
= 1.05 V, IO=10mA
T
A
= 25°C, V
O
= 1.05 V, continuous mode 757 765 773
V
FBTH
V
FB
threshold voltage mV
T
A
= 0°C to 85°C, V
O
= 1.05 V, continuous
753 777
mode
(1)
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 V < V
CC
< 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
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
dsonh
High side switch resistance 25°C, V
BST
- SW1,2 = 5.5 V 160 mΩ
R
dsonl
Low side switch resistance 25°C 110 mΩ
CURRENT LIMIT
I
ocl
Current limit L out = 2.2 μH
(1)
2.5 3.1 4.5 A
(1) Not production tested.
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