Datasheet

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ELECTRICAL CHARACTERISTICS
TPS54010
SLVS509B – MAY 2004 – REVISED JUNE 2005
T
J
= -40°C to 125°C, VIN = 3 V to 4 V, PVIN = 2.2 V to 4 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY VOLTAGE, VIN
V
I
Input voltage, VIN 3 4 V
Supply voltage range, PVIN Output = 1.8 V 2.2 4 V
f
s
= 350 kHz, RT open, PH pin open, PVIN = 2.5 V,
6.3 10 mA
SYNC = 0 V
VIN f
s
= 550 kHz, RT open, PH pin open, SYNC ≥ 2.5 V, 8.3 13 mA
PVIN = 2.5 V
SHUTDOWN, SS/ENA = 0 V, PVIN = 2.5 V 1 1.4 mA
I
Q
Quiescent current
f
s
= 350 kHz, RT open, PH pin open, PVIN = 3.3 V,
6 8 mA
SYNC = 0 V
PVIN f
s
= 550 kHz, RT open, PH pin open, SYNC ≥ 2.5 V,
6 9 mA
PVIN = 2.5 V, VIN = 3.3 V
SHUTDOWN, SS/ENA = 0 V, VIN = 3.3 V <140 µA
UNDERVOLTAGE LOCKOUT (VIN)
Start threshold voltage, UVLO 2.95 3 V
Stop threshold voltage, UVLO 2.7 2.8 V
Hysteresis voltage, UVLO 0.11 V
Rising and falling edge deglitch, UVLO
(1)
2.5 µs
BIAS VOLTAGE
Output voltage, VBIAS I
(VBIAS)
= 0 2.7 2.8 2.9 V
Output current, VBIAS
(2)
100 µA
CUMULATIVE REFERENCE
V
ref
Accuracy 0.882 0.891 0.900 V
REGULATION
Line regulation
(1) (3)
I
L
= 7 A, f
s
= 350 kHz, T
J
= 85°C 0.05 %/V
I
L
= 0 A to 14 A, f
s
= 350 kHz, T
J
= 85°C
Load regulation
(1) (3)
0.013 %/A
PVIN = 2.5 V, VIN = 3.3 V
OSCILLATOR
RT open
(1)
, SYNC ≤ 0.8 V 280 350 420
Internally set—free running frequency kHz
RT open
(1)
, SYNC ≥ 2.5 V 440 550 660
RT = 180 k Ω (1% resistor to AGND)
(1)
252 280 308
Externally set—free running frequency range RT = 100 k Ω (1% resistor to AGND) 460 500 540 kHz
RT = 68 k Ω (1% resistor to AGND)
(1)
663 700 762
High-level threshold voltage, SYNC 2.5 V
Low-level threshold voltage, SYNC 0.8 V
Pulse duration, SYNC
(1)
50 ns
Frequency range, SYNC 300 700 kHz
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) Specified by the circuit used in Figure 12
3