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| 型號： | TPS40055MPWPREPG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | PLASTIC, HTSSOP-16 |
| 文件頁數(shù)： | 30/35頁 |
| 文件大小： | 2348K |
| 代理商： | TPS40055MPWPREPG4 |
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SGLS310B – JULY 2005 – REVISED OCTOBER 2010
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
TA = –55°C to 125°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
VFB = 0 V, fSW ≤ 500 kHz
84%
94%
Maximum duty cycle
VFB = 0 V, 500 kHz ≤ fSW ≤ 1 MHz
(2)
80%
Minimum duty cycle
VFB ≥ 0.75 V
0%
VKFF
Feed-forward voltage
3.35
3.48
3.7
V
IKFF
Feed-forward current operating range(2)
20
1200
A
SOFT START
ISS
Soft-start source current
1.2
2.35
3.6
A
VSS
Soft-start clamp voltage
3.7
V
tDSCH
Discharge time
CSS = 220 pF
1.4
2.2
3.4
s
tSS
Soft-start time
CSS = 220 pF, 0 V ≤ VSS ≤ 1.6 V
102
150
230
s
BP10
VBP10
Output voltage
IOUT ≤ 1 mA
8.9
9.6
10.45
V
ERROR AMPLIFIER
8 V
≤ VIN ≤ 40 V, TA = 25°C
0.698
0.7
0.704
8 V
≤ VIN ≤ 40 V, 0°C ≤ TA ≤ 125°C
0.689
0.7
0.717
VFB
Feedback input voltage
V
8 V
≤ VIN ≤ 40 V, –55°C ≤ TA ≤
0.689
0.7
0.719
125°C
GBW
Gain bandwidth(3)
2.8
5
MHz
AVOL
Open loop gain
40
80
dB
IOH
High-level output source current
1.85
4
mA
IOL
Low-level output source current
1.95
4
VOH
High-level output voltage
ISOURCE = 500 A
3.1
3.5
V
VOL
Low-level output voltage
ISINK = 500 A
0.2
0.37
IBIAS
Input bias current
VFB = 0.7 V
100
220
nA
CURRENT LIMIT
ISINK
Current limit sink current
7.5
10
12.2
A
VILIM = 23.7 V, VSW = (VILIM – 0.5 V)
300
Propagation delay to output
ns
VILIM = 23.7 V, VSW = (VILIM – 2 V)
200
tON
Switch leading-edge blanking pulse time(3)
100
ns
tOFF
Off time during a fault
7
cycle
s
VILIM = 23.6 V, TA = 25°C
–115
–70
–50
VILIM = 23.6 V, 0°C ≤ TA ≤ 125°C
–155
–38
VILIM = 23.6 V, –55°C ≤ TA ≤ 125°C
–155
–10
VOS
Offset voltage SW vs ILIM
mV
VILIM = 11.6 V, TA = 25°C
–118
–43
VILIM = 11.6 V, 0°C ≤ TA ≤ 125°C
–160
–45
VILIM = 11.6 V, TA = –55°C to 125°C
–160
–15
OUTPUT DRIVER
tLRISE
Low-side driver rise time
48
110
CLOAD = 2200 pF
ns
tLFALL
Low-side driver fall time
24
58
tHRISE
High-side driver rise time
48
105
CLOAD = 2200 pF, (HDRV – SW)
ns
tHFALL
High-side driver fall time
36
82
VOH
High-level output voltage, HDRV
IHDRV = –0.1 A (HDRV - SW)
BOOST BOOST
V
–1.9
–1
VOL
Low-level output voltage, HDRV
IHDRV = 0.1 A (HDRV - SW)
0.85
V
(3)
Ensured by design. Not production tested.
4
Copyright 2005–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS40055-EP
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