Datasheet
TPS54611, TPS54612
TPS54613, TPS54614
TPS54615, TPS54616
SLVS400C − AUGUST 2001 − REVISED APRIL 2005
www.ti.com
4
ELECTRICAL CHARACTERISTICS
T
J
= –40°C to 125°C, V
I
= 3 V to 6 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY VOLTAGE, VIN
Input voltage range, VIN 3.0 6.0 V
f
s
= 350 kHz, FSEL ≤ 0.8 V, RT open, phase pin open 6.2 9.6
I
(
Q
)
Quiescent current
f
s
= 550 kHz, FSEL ≤ 2.5 V, RT open, phase pin open 8.4 12.8
mA
I
(Q)
Quiescent current
Shutdown, SS/ENA = 0 V 1 1.4
mA
UNDER VOLTAGE LOCK OUT
Start threshold voltage, UVLO 2.95 3.0 V
Stop threshold voltage, UVLO 2.70 2.80 V
Hysteresis voltage, UVLO 0.14 0.16 V
Rising and falling edge deglitch,
UVLO
(1)
2.5 µs
BIAS VOLTAGE
Output voltage, VBIAS I
(VBIAS)
= 0 2.70 2.80 2.90 V
Output current, VBIAS
(2)
100 µA
OUTPUT VOLTAGE
TPS54611
T
J
= 25°C, VIN = 5 V 0.9 V
TPS54611
3 V ≤ VIN ≤ 6 V, 0 ≤ I
L
≤ 6 A, −40° ≤ T
J
≤ 125°C −2.0% 2.0%
TPS54612
T
J
= 25°C, VIN = 5 V 1.2 V
TPS54612
3 V ≤ VIN ≤ 6 V, 0 ≤ I
L
≤ 6 A, −40° ≤ T
J
≤ 125°C −2.0% 2.0%
TPS54613
T
J
= 25°C, VIN = 5 V 1.5 V
V
O t t lta
TPS54613
3 V ≤ VIN ≤ 6 V, 0 ≤ I
L
≤ 6 A, −40° ≤ T
J
≤ 125°C −2.0% 2.0%
V
O
Output voltage
TPS54614
T
J
= 25°C, VIN = 5 V 1.8 V
TPS54614
3 V ≤ VIN ≤ 6 V, 0 ≤ I
L
≤ 6 A, −40° ≤ T
J
≤ 125°C −3.0% 3.0%
TPS54615
T
J
= 25°C, VIN = 5 V 2.5 V
TPS54615
3 V ≤ VIN ≤ 6 V, 0 ≤ I
L
≤ 6 A, −40° ≤ T
J
≤ 125°C −3.0% 3.0%
TPS54616
T
J
= 25°C, VIN = 5 V 3.3 V
TPS54616
4 V ≤ VIN ≤ 6 V, 0 ≤ I
L
≤ 6 A, −40° ≤ T
J
≤ 125°C −3.0% 3.0%
REGULATION
Line regulation
(1)
(3)
I
L
= 3 A, 350 ≤ f
s
≤ 550 kHz, T
J
= 85°C 0.088 %/V
Load regulation
(1)
(3)
I
L
= 0 A to 6 A, 350 ≤ f
s
≤ 550 kHz, T
J
= 85°C 0.0917 %/A
OSCILLATOR
Internally set free running frequency
FSEL ≤ 0.8 V, RT open 280 350 420
kHz
Internally set—free running frequency
FSEL ≥ 2.5 V, RT open 440 550 660
kHz
Et ll t f i
RT = 180 kΩ (1% resistor to AGND)
(1)
252 280 308
Externally set—free running
frequency range
RT = 100 kΩ (1% resistor to AGND) 460 500 540
kHz
f
requency
range
RT = 68 kΩ (1% resistor to AGND)
(1)
663 700 762
kHz
High level threshold, FSEL 2.5 V
Low level threshold, FSEL 0.8 V
Ramp valley
(1)
0.75 V
Ramp amplitude (peak-to-peak)
(1)
1 V
Minimum controllable on time
(1)
200 ns
Maximum duty cycle
(1)
90%
(1)
Specified by design
(2)
Static resistive loads only
(3)
Tested using circuit in Figure 10.