參數(shù)資料
型號： TPS40070PWPRG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16
封裝： GREEN, PLASTIC, HTSSOP-16
文件頁數(shù)： 22/28頁
文件大小： 655K
代理商： TPS40070PWPRG4
ELECTRICAL CHARACTERISTICS
www.ti.com .................................................................................................................................................. SLUS582J – DECEMBER 2003 – REVISED APRIL 2009
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 (1)
fOSC
Accuracy
450
500
550
kHz
VRAMP
PWM ramp voltage(2)
VPEAK-VVAL
2.0
V
VRT
RT voltage
2.23
2.40
2.58
V
tON
Minimum output pulse time(2)
CHDRV = 0 nF
250
ns
VFB = 0 V, 100 kHz ≤ fSW ≤ 500 kHz
84%
93%
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(2)
20
1100
A
SOFT START
ISS
Charge current
7
12
17
A
tDSCH
Discharge time
CSS = 3.9 nF
25
75
s
CSS = 3.9 nF,
tSS
Soft-start time
210
290
500
VSS rising from 0.7 V to 1.6 V
Command zero output voltage(1)
300
mV
DBP
VDD > 10 V
7
8
9
VDBP
Output voltage
V
VDD = 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
≤ TA≤ 85°C
0.690
0.700
0.707
V
40°C
≤ TA≤ 85°C
0.690
0.700
0.715
VSS
Soft-start offset from VSS(2)
Offset from VSS to error amplifier
1
GBW
Gain bandwidth(2)
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
(1)
For zero output voltage only. Does not assure lack of activity on HDRV or LDRV.
(2)
Ensured by design. Not production tested.
Copyright 2003–2009, Texas Instruments Incorporated
3
Product Folder Link(s): TPS40070 TPS40071
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