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參數資料
| 型號： | TPS40075RHLR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC20 |
| 封裝： | PLASTIC, QFN-20 |
| 文件頁數： | 34/44頁 |
| 文件大小： | 806K |
| 代理商： | TPS40075RHLR |
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ELECTRICAL CHARACTERISTICS
SLUS676A – MAY 2006 – REVISED SEPTEMBER 2007
TA = –40°C to 85°C, VIN = 12 Vdc, RT = 90.9 k, IKFF = 300 A, fSW = 500 kHz, all parameters at zero power dissipation
(unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
INPUT SUPPLY
VDD
Input voltage range, VIN
4.5
28
V
OPERATING CURRENT
IDD
Quiescent current
Output drivers not switching
2.5
3.5
mA
LVBP
VLVBP
Output voltage
TA = TJ = 25°C
3.9
4.2
4.5
V
OSCILLATOR/RAMP GENERATOR
fOSC
Accuracy
450
500
550
kHz
VRT
RT voltage
2.23
2.40
2.58
V
tON(min)
Minimum output pulse time(1)
CHDRV = 0 nF
150
ns
VIH
High-level input voltage, SYNC
2
5
V
VIL
Low-level input voltage, SYNC
0.8
ISYNC
Input current, SYNC
5
10
A
VFB = 0 V, 100 kHz ≤ fSW ≤ 500 kHz
84%
95%
Maximum duty cycle
VFB = 0 V, fSW = 1 MHz
76%
93%
VKFF
Feed-forward voltage
0.35
0.40
0.45
V
IKFF
Feed-forward current operating range(1)
20
1100
A
SOFT START
ISS
Charge current
9.5
12
14.5
A
tDSCH
Discharge time
CSS = 3.9 nF
25
75
s
CSS = 3.9 nF, VSS rising from 0.7 V to 1.6
tSS
Soft-start time
210
290
500
V
VSSSD
Shutdown threshold, VSS falling
225
275
325
VSSEN
Enable threshold, VSS rising
310
410
mV
VSSSDHYS Shutdown threshold hysteresis
35
130
DBP
VDD > 10 V
7
8
9
VDBP
Output voltage
V
VVDD = 4.5 V, IOUT = 25 mA
4.0
4.3
ERROR AMPLIFIER
TA = TJ = 25°C
0.698
0.700
0.704
VFB
Feedback regulation voltage total variation
0
°C ≤ T
A = TJ ≤ 85°C
0.690
0.700
0.707
V
-40
°C ≤ T
A = TJ ≤ 85°C
0.690
0.700
0.715
VSS(offset) Soft-start offset from VSS
(1)
Offset from VSS to error amplifier
1
GBWP
Gain bandwidth(1)
5
10
MHz
AVOL
Open loop gain
50
dB
ISRC
Output source current
2.5
4.5
mA
ISINK
Output sink current
2.5
6
IBIAS
Input bias current
VFB = 0.7 V
–250
0
nA
SHORT CIRCUIT CURRENT PROTECTION
IILIM
Current sink into ILIM pin
115
135
150
A
VILIM(ofst)
Current limit offset voltage
VILIM = 11.5 V, (VSW - VILIM) VVDD = 12 V
–50
–30
–10
mV
tHSC
Minimum HDRV pulse width
During short circuit
135
225
ns
Propagation delay to output(1)
50
ns
tBLANK
Blanking time(1)
50
ns
(1)
Ensured by design. Not production tested.
4
Copyright 2006–2007, Texas Instruments Incorporated
Product Folder Link(s) :TPS40075
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