Datasheet

TPS5401
www.ti.com SLVSAB0 –DECEMBER 2010
THERMAL INFORMATION (continued)
TPS5401
THERMAL METRIC
(1)
UNIT
MSOP (10 PINS)
q
JB
Junction-to-board thermal resistance 44.6 °C/W
y
JT
Junction-to-top characterization parameter 1.4 °C/W
y
JB
Junction-to-board characterization parameter 22.8 °C/W
q
JC(bottom)
Junction-to-case(bottom) thermal resistance 25.6 °C/W
ELECTRICAL CHARACTERISTICS
T
J
= –40°C to 150°C, V
IN
= 3.5 V to 42 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY VOLTAGE (VIN PIN)
V
IN
Operating input voltage 3.5 42 V
Internal undervoltage lockout
No voltage hysteresis, rising and falling 2.5 V
threshold
Shutdown supply current V
EN
= 0 V 1.3 4
mA
Operating: nonswitching supply
V
VSENSE
= 0.83 V, V
IN
= 12 V, 25°C 116 136
current
ENABLE AND UVLO (EN PIN)
Enable threshold voltage No voltage hysteresis, rising and falling, 25°C 0.9 1.25 1.55 V
Enable threshold 50 mV –3.8
Input current mA
Enable threshold –50 mV –0.9
Hysteresis current –2.9 mA
VOLTAGE REFERENCE
V
ref
Voltage reference 0.772 0.8 0.828 V
HIGH-SIDE MOSFET
V
IN
= 3.5 V, V
BOOT
– V
PH
= 3 V 300
On-resistance mΩ
V
IN
= 12 V, V
BOOT
– V
PH
= 6 V 200 410
ERROR AMPLIFIER
Input current 50 nA
Error amplifier transconductance –2 mA < I
COMP
< 2 mA, V
COMP
= 1 V 97 mMhos
gm
EA
–2 mA < I
COMP
< 2 mA, V
COMP
= 1 V,
Error amplifier transconductance
26 mMhos
during slow-start
V
VSENSE
= 0.4 V
Error amplifier dc gain V
VSENSE
= 0.8 V 10,000 V/V
Error amplifier bandwidth 2700 kHz
Error amplifier source/sink V
COMP
= 1 V, 100 mV overdrive ±7 mA
COMP to switch current
gm
PS
1.9 A/V
transconductance
CURRENT LIMIT
Current limit threshold V
IN
= 12 V, T
J
= 25°C 0.6 0.94 A
THERMAL SHUTDOWN
Thermal shutdown 182 °C
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