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TPS71319 数据表(PDF) 3 Page - Texas Instruments

部件名 TPS71319
功能描述  Dual 250 mA Output, UltraLow Noise, High PSRR, Low-Dropout Linear Regulator with Integrated SVS
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

TPS71319 数据表(HTML) 3 Page - Texas Instruments

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ELECTRICAL CHARACTERISTICS
TPS71319
TPS71334
SBVS055A – DECEMBER 2004 – REVISED JANUARY 2005
Over operating temperature range (T
J = -40°C to +125°C), VIN = highest VOUT(nom) + 1.0 V or 2.7 V (whichever is greater),
I
OUT = 1 mA, VEN1, 2 = 1.2 V, COUT = 10 µF, CNR = 0.01 µF, and adjustable LDOs are tested at VOUT = 3.0 V, unless otherwise
noted. Typical values are at T
J = 25°C.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIN
Input voltage range(1)
2.7
5.5
V
VFB
Internal reference (adjustable LDOs)
1.200
1.225
1.250
V
Output voltage range
VFB
5.5 - VDO
V
(adjustable LDOs)
VOUT
Nominal
TJ = 25°C, IOUT = 0 mA
-1.5
+1.5
Accuracy(1)
%
Over VIN,
VOUT + 1.0 V ≤ VIN ≤ 5.5 V,
-3
±1
+3
IOUT, and T 0 µA ≤ IOUT ≤ 250 mA
∆V
OUT%/∆VIN
Line regulation(1)
VOUT + 1.0 V ≤ VIN ≤ 5.5 V
0.05
%/V
∆V
OUT%/∆IOUT
Load regulation
0 µA
≤ I
OUT ≤ 250 mA
0.8
%/mA
2.8 V,
Dropout voltage(2)
VDO
2.85 V
IOUT1 = IOUT2 = 250 mA
125
230
mV
(VIN = VOUT(nom) - 0.1V)
Adjustable
ICL
Output current limit
VOUT = 0.9 × VOUT(nom)
400
600
800
mA
One LDO
IOUT = 1 mA (enabled channel)
190
250
enabled
IGND
Ground pin current
µA
Both LDOs
IOUT1 = IOUT2 = 1 mA to 250 mA
300
600
enabled
VEN ≤ 0.4 V, 0 V ≤ VIN ≤ 5.5 V,
ISHDN
Shutdown current(3)
0.3
2.0
µA
RESET open
IFB
FB pin current (adjustable LDOs)
0.1
1
µA
No CNR, IOUT = 250 mA
80.0
× V
OUT
Output noise voltage,
Vn
µVrms
BW = 10 Hz - 100 kHz
CNR = 0.01 µF, IOUT = 250 mA
11.8
× V
OUT
f = 100 Hz, IOUT = 250 mA
65
Power-supply rejection ratio
PSRR
dB
(ripple rejection)
f = 10 kHz, IOUT = 250 mA
65
tSTR
Startup time
VOUT = 2.85 V, RL = 30Ω, CNR = 0.001 µF
60
µs
VIH
Enable threshold high (EN1, EN2)
1.2
VIN
V
VIL
Enable threshold low (EN1, EN2)
0
0.4
V
IEN
Enable pin current (EN1, EN2)
VIN = VEN = 5.5 V
-1
1
µA
Minimum VIN for valid RESET
IRESET = 10 µA
0.6
V
VRESET, LO
RESET output low voltage
IRESET = 1 mA
0.4
V
ILKG, RESET
RESET leakage current
VIN = VRESET = 5.5 V
10
500
nA
VIT
RESET threshold voltage
VOUT2 falling(4)
92.5
97.5
%VOUT
VHYS
RESET threshold hysteresis
VOUT2 rising(4)
0.5
%VOUT
TD
RESET delay time
50
100
200
ms
TP
RESET propagation delay
10
µs
Shutdown
Temp increasing
+160
TSD
Thermal shutdown temperature
°C
Reset
Temp decreasing
+140
Under-voltage lockout threshold
VIN rising
2.25
2.65
V
UVLO
Under-voltage lockout hysteresis
VIN falling
100
mV
(1)
Minimum VIN = VOUT + VDO or 2.7 V, whichever is greater.
(2)
VDO is not measured for 1.8 V regulators since minimum VIN = 2.7 V.
(3)
For the adjustable version, this applies only after VIN is applied; then VEN transitions from high to low.
(4)
RESET threshold and hysteresis is a percentage of the measured output.
3


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