Datasheet

 
 
 
SLVS519A − MAY 2004 − REVISED OCTOBER 2004
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4
ELECTRICAL CHARACTERISTICS
T
J
= –40°C to 125°C, VIN = 4.5 V to 20 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY CURRENT
I
Q
Quiescent current
Operating current, PH pin open,
No external low side MOSFET, RT = Hi-Z
5 mA
I
Q
Quiescent current
Shutdown, ENA = 0 V 1 mA
Start threshold voltage
TPS54352−6 4.32 4.49
V
Start threshold voltage
TPS54357 6.4 6.65
V
VIN
Stop threshold voltage
TPS54352−6 3.69 3.97
V
VIN
Stop threshold voltage
TPS54357 5.45 5.80
V
Hysteresis
TPS54352−6 350 mV
Hysteresis
TPS54357 600 mV
OUTPUT VOLTAGE
TPS54352
T
J
= 25°C, I
O
= 100 mA to 3 A 1.88 1.2 1.212
TPS54352
I
O
= 100 mA to 3 A 1.176 1.2 1.224
TPS54353
T
J
= 25°C, I
O
= 100 mA to 3 A 1.485 1.5 1.515
TPS54353
I
O
= 100 mA to 3 A 1.47 1.5 1.53
TPS54354
T
J
= 25°C, I
O
= 100 mA to 3 A 1.782 1.8 1.818
V
O
Output voltage
TPS54354
I
O
= 100 mA to 3 A 1.764 1.8 1.836
V
V
O
Output voltage
TPS54355
T
J
= 25°C, I
O
= 100 mA to 3 A 2.475 2.5 2.525
V
TPS54355
I
O
= 100 mA to 3 A 2.45 2.5 2.55
TPS54356
T
J
= 25°C, VIN = 5.5 V to 20 V, I
O
= 100 mA to 3 A 3.267 3.3 3.333
TPS54356
VIN = 5.5 V to 20 V, I
O
= 100 mA to 3 A 3.234 3.3 3.366
TPS54357
T
J
= 25°C, VIN = 7.5 V to 20 V, I
O
= 100 mA to 3 A 4.95 5.0 5.05
TPS54357
VIN = 7.5 V to 20 V, I
O
= 100 mA to 3 A 4.90 5.0 5.10
UNDER VOLTAGE LOCK OUT (UVLO PIN)
Start threshold voltage 1.20 1.24 V
UVLO
Stop threshold voltage 1.02 1.10 V
UVLO
Hysteresis 100 mV
BIAS VOLTAGE (VBIAS PIN)
VBIAS
Output voltage
I
VBIAS
= 1 mA, VIN ≥ 12 V 7.5 7.8 8.0
V
VBIAS
Output voltage
I
VBIAS
= 1 mA, VIN = 4.5 V 4.4 4.47 4.5
V
OSCILLATOR (RT PIN)
Internally set PWM switching frequency
RT Grounded 200 250 300
kHz
Internally set PWM switching frequency
RT Open 400 500 600
kHz
Externally set PWM switching frequency RT = 100 kΩ (1% resistor to AGND) 425 500 575 kHz