Datasheet

TPS54227
www.ti.com SLVSAU2B –MAY 2011–REVISED JUNE 2013
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 6
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 5.0 10 μA
LOGIC THRESHOLD
V
ENH
EN high-level input voltage EN 1.6 V
V
ENL
EN low-level input voltage EN 0.6 V
R
EN
EN pin resistance to GND V
EN
= 12 V 220 440 880 kΩ
V
FB
VOLTAGE AND DISCHARGE RESISTANCE
V
FBTH
V
FB
threshold voltage T
A
= 25°C, V
O
= 1.05 V, continuous mode 749 765 781 mV
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
High side switch resistance (DDA) 155
R
DS(on)h
25°C, V
BST
- SW = 5.5 V mΩ
High side switch resistance (DRC) 165
R
DS(on)l
Low side switch resistance 25°C 108 mΩ
CURRENT LIMIT
I
ocl
Current limit L out = 2.2 μH
(1)
2.5 3.3 4.7 A
THERMAL SHUTDOWN
Shutdown temperature
(1)
165
T
SDN
Thermal shutdown threshold °C
Hysteresis
(1)
35
(1) Not production tested.
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