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參數資料
| 型號： | TPS71H48Q |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | LOW-DROPOUT VOLTAGE REGULATORS |
| 中文描述： | 低壓差電壓調節器 |
| 文件頁數： | 7/40頁 |
| 文件大小： | 634K |
| 代理商： | TPS71H48Q |
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TPS71H01Q, TPS71H33Q, TPS71H48Q, TPS71H50Q
LOW-DROPOUT VOLTAGE REGULATORS
SLVS152B
–
NOVEMBER 1996
–
REVISED AUGUST 2002
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
TPS71H01 electrical characteristics at I
O
= 10 mA, V
I
= 3.5 V, EN = 0 V, C
O
= 4.7
μ
F/CSR
= 1
, FB
shorted to OUT at device leads (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TJ
TPS71H01Q
MIN
1.178
UNIT
TYP
MAX
Reference voltage (measured at
FB with OUT connected to FB)
VI = 3.5 V,
2.5 V
≤
VI
≤
10 V,
See Note 1
IO = 10 mA
5 mA
≤
IO
≤
500 mA,
25
°
C
V
–
40
°
C to 125
°
C
1.143
1.213
V
Reference voltage temperature
coefficient
–
40
°
C to 125
°
C
61
75
ppm/
°
C
VI = 2.4 V,
2 4 V
50 A
≤
A
IO
150 mA
≤
25
°
C
0.7
1
–
40
°
C to 125
°
C
25
°
C
–
40
°
C to 125
°
C
25
°
C
–
40
°
C to 125
°
C
25
°
C
25
°
C
25
°
C
–
40
°
C to 125
°
C
25
°
C
–
40
°
C to 125
°
C
25
°
C
–
40
°
C to 125
°
C
25
°
C
–
40
°
C to 125
°
C
25
°
C
–
40
°
C to 125
°
C
25
°
C
25
°
C
25
°
C
25
°
C
1
VI = 2.4 V,
2 4 V
≤
150 mA
IO
500 mA
≤
0.83
1.3
Pass-element series resistance
(see Note 2)
1.3
VI = 2.9 V,
2 9 V
50 A
≤
A
IO
500 mA
≤
0.52
0.85
0.85
VI = 3.9 V,
VI = 5.9 V,
VI = 2.5 V to 10 V,
See Note 1
50
μ
A
≤
IO
≤
500 mA
50
μ
A
≤
IO
≤
500 mA
50
μ
A
≤
IO
≤
500 mA,
0.32
0.23
Input regulation
18
mV
25
IO = 5 mA to 500 mA,
See Note 1
2.5 V
≤
VI
≤
10 V,
14
mV
Output regulation
25
IO = 50
μ
A to 500 mA,
See Note 1
2.5 V
≤
VI
≤
10 V,
22
mV
54
IO = 50 A
μ
A
48
59
Ripple rejection
f = 120 Hz
44
dB
IO = 500 mA,
See Note 1
45
54
44
Output noise-spectral density
f = 120 Hz
2
μ
V/
√
Hz
≤
≤
10 Hz
f
100 kHz,
CO = 4.7
μ
F
CO = 10
μ
F
CO = 100
μ
F
95
Output noise voltage
Out ut noise voltage
89
μ
Vrms
CSR
= 1
74
PG trip-threshold voltage
§
VFB voltage decreasing from above VPG
–
40
°
C to 125
°
C
1.101
1.145
V
PG hysteresis voltage
§
Measured at VFB
25
°
C
12
mV
PG output low voltage
§
IPG = 400 A
μ
A,
VI = 2.13 V
2 13 V
25
°
C
0.1
0.4
V
–
40
°
C to 125
°
C
25
°
C
–
40
°
C to 125
°
C
0.4
FB input current
–
10
–
20
0.1
10
20
nA
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance
to CO.
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must
be taken into account separately.
§
Output voltage programmed to 2.5 V with closed-loop configuration (see application information).
NOTES:
1. When VI < 2.9 V and IO > 150 mA simultaneously, pass element rDS(on) increases (see Figure 27) to a point such that the resulting
dropout voltage prevents the regulator from maintaining the specified tolerance range.
2. To calculate dropout voltage, use equation:
VDO = IO
rDS(on)
rDS(on) is a function of both output current and input voltage. The parametric table lists rDS(on) for VI = 2.4 V, 2.9 V, 3.9 V, and
5.9 V, which corresponds to dropout conditions for programmed output voltages of 2.5 V, 3 V, 4 V, and 6 V, respectively. (For other
programmed values, see Figure 26.)
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