TPS54314PWPR Datasheet, PDF (3/22 Pages) Texas Instruments – 3-V TO 6-V INPUT, 3-A OUTPUT SYNCHRONOUS-BUCK PWM SWITCHER WITH INTEGRATED FETs (SWIFT™)

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TPS54311, TPS54312
TPS54313, TPS54314
TPS54315, TPS54316
SLVS416B − FEBRUARY 2002 − REVISED APRIL 2005
ELECTRICAL CHARACTERISTICS
T_J = −40°C to 125°C, VIN = 3 V to 6 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
SUPPLY VOLTAGE, VIN
VIN input voltage range
Quiescent current
f_s = 350 kHz,
f_s = 550 kHz,
Phase pin open
Shutdown,
FSEL = 0.8 V,
FSEL ≥ 2.5 V,
SS/ENA = 0 V
RT open
RT open,
UNDER VOLTAGE LOCK OUT
Start threshold voltage, UVLO
Stop threshold voltage, UVLO
Hysteresis voltage, UVLO
Rising and falling edge deglitch,
UVLO⁽¹⁾
BIAS VOLTAGE
Output voltage, VBIAS
Output current, VBIAS⁽²⁾
I_(VBIAS) = 0
OUTPUT VOLTAGE
TPS54311
TPS54312
V_O Output voltage
TPS54313
TPS54314
TPS54315
TPS54316
REGULATION
Line regulation^{(1) (3)}
Load regulation ^{(1) (3)}
OSCILLATOR
Internally set free-running frequency
range
Externally set free-running frequency
range
High-level threshold voltage at FSEL
Low-level threshold voltage at FSEL
Ramp valley⁽¹⁾
Ramp amplitude (peak-to-peak)⁽¹⁾
Minimum controllable on time⁽¹⁾
Maximum duty cycle
(1) _{Specified by design}
(2) _{Static resistive loads only}
(3) _{Specified by the circuit used in Figure 10.}
T_J = 25°C,
3 ≤ VIN ≤ 6 V,
T_J = 25°C,
3 ≤ VIN ≤ 6 V,
T_J = 25°C,
3 ≤ VIN ≤ 6 V,
T_J = 25°C,
3 ≤ VIN ≤ 6 V,
T_J = 25°C,
3 ≤ VIN ≤ 6 V,
T_J = 25°C,
3 ≤ VIN ≤ 6 V,
VIN = 5 V
0 ≤ IL ≤ 3 A,
VIN = 5 V
0 ≤ IL ≤ 3 A,
VIN = 5 V
0 ≤ IL ≤ 3 A,
VIN = 5 V
0 ≤ IL ≤ 3 A,
VIN = 5 V
0 ≤ IL ≤ 3 A,
VIN = 5 V
0 ≤ IL ≤ 3 A,
−40 ≤ T_J ≤ 125
−40 ≤ T_J ≤ 125
−40 ≤ T_J ≤ 125
−40 ≤ T_J ≤ 125
−40 ≤ T_J ≤ 125
−40 ≤ T_J ≤ 125
I_L = 1.5 A,
I_L = 0 A to 3 A,
350 ≤ f_s ≤ 550 kHz, T_J = 85°C
350 ≤ f_s ≤ 550 kHz, T_J = 85°C
FSEL ≤ 0.8 V, RT open
FSEL ≥ 2.5 V, RT open
RT = 180 kΩ (1% resistor to AGND)⁽¹⁾
RT = 100 kΩ (1% resistor to AGND)
RT = 68 kΩ (1% resistor to AGND)⁽¹⁾
MIN
3
2.70
0.14
2.70
−2.5%
−2.5%
−2.5%
−2.5%
−2.5%
−2.5%
280
440
252
460
663
2.5
90%
TYP MAX UNIT
6V
6.2 9.6
8.4 12.8 mA
1 1.4
2.95
3
V
2.80
0.16
V
2.5
µs
2.80 2.90 V
100 µA
0.9
V
2.5%
1.2
V
2.5%
1.5
V
2.5%
1.8
V
2.5%
2.5
V
2.5%
3.3
V
2.5%
0.21
%/V
0.21
%/A
350 420
kHz
550 660
280 308
500 540 kHz
700 762
V
0.8 V
0.75
V
1
V
200 ns
3