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| 型号： | TPS40054PWPRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | GREEN, PLASTIC, HTSSOP-16 |
| 文件页数： | 23/35页 |
| 文件大小： | 866K |
| 代理商： | TPS40054PWPRG4 |
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ELECTRICAL CHARACTERISTICS
www.ti.com ...................................................................................................................................... SLUS593F – DECEMBER 2003 – REVISED SEPTEMBER 2008
TA = –40°C to 85°C, VIN = 24 Vdc, RT = 90.9 k, IKFF = 150 A, fSW = 500 kHz, all parameters at zero power dissipation
(unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
INPUT SUPPLY
VIN
Input voltage range, VIN
8
40
V
OPERATING CURRENT
IDD
Quiescent current
Output drivers not switching, VFB ≥ 0.75 V
1.5
3.0
mA
BP5
VBP5
Output voltage
IO ≤ 1 mA
4.7
5.0
5.2
V
OSCILLATOR/RAMP GENERATOR
fOSC
Accuracy
8 V
≤ VIN ≤ 40 V
470
520
570
kHz
VRAMP
PWM ramp voltage(1)
VPEAK – VVAL
2.0
V
VIH
High-level input voltage, SYNC
2
VIL
Low-level input voltage, SYNC
0.8
V
ISYNC
Input current, SYNC
5
10
A
Pulse width, SYNC
50
ns
VRT
RT voltage
2.38
2.50
2.58
V
VFB = 0 V, fSW ≤ 500 kHz
85%
94%
DMAX
Maximum duty cycle
VFB = 0 V, 500 kHz ≤ fSW ≤ 1 MHz
(1)
80%
Minumum duty cycle
VFB ≥ 0.75 V
0%
VKFF
Feed-forward voltage
3.35
3.48
3.65
V
IKFF
Feed-forward current operating range(1)(2)
20
1100
A
SOFT START
ISS/SD
Soft-start source current
1.65
2.35
2.95
A
VSS/SD
Soft-start clamp voltage
3.7
V
tDSCH
Discharge time
CSS/SD = 220 pF
1.6
2.2
2.8
s
tSS/SD
Soft-start time
CSS/SD = 220 pF, 0 V ≤ VSS/SD ≤ 1.6 V
115
150
215
BP10
VBP10
Output voltage
IO ≤ 1 mA
9.0
9.6
10.3
V
ERROR AMPLIFIER
8 V
≤ VIN ≤ 40 V, TA = 25°C
0.698
0.700
0.704
VFB
Feedback input voltage
8 V
≤ VIN ≤ 40 V, 0°C ≤ TA ≤ 85°C
0.693
0.700
0.707
V
8 V
≤ VIN ≤ 40 V, -40°C≤ TA ≤ 85°C
0.693
0.700
0.715
GBW
Gain bandwidth(1)
3.0
5.0
MHz
AVOL
Open loop gain
60
80
dB
IOH
High-level output source current
2.0
4.0
mA
IOL
Low-level output sink current
2.0
4.0
VOH
High-level output voltage
ISOURCE = 500 A
3.2
3.5
V
VOL
Low-level output voltage
ISINK = 500 A
0.20
0.35
IBIAS
Input bias current
VFB = 0.7 V
100
200
nA
(1)
Ensured by design. Not production tested.
(2)
IKFF increases with SYNC frequency, maximum duty cycle decreases with IKFF.
Copyright 2003–2008, Texas Instruments Incorporated
3
Product Folder Link(s): TPS40054 TPS40055 TPS40057
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