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參數(shù)資料
| 型號： | TPS61251DSG |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 3500 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 2 X 2 MM, PLASTIC, WSON-8 |
| 文件頁數(shù)： | 15/21頁 |
| 文件大?。?/td> | 446K |
| 代理商： | TPS61251DSG |
www.ti.com
SLVSAF7 – SEPTEMBER 2010
RECOMMENDED OPERATING CONDITIONS
MIN
NOM
MAX UNIT
Supply voltage at VIN
2.3
6.0
V
Output voltage at VOUT
3.0
6.5
V
Programable input current limit set by RILIM
100
1500
mA
Operating free air temperature range, TA
–40
85
°C
Operating junction temperature range, TJ
–40
125
°C
ELECTRICAL CHARACTERISTICS
Over recommended free air temperature range, typical values are at TA = 25°C. Unless otherwise noted, specifications apply
for condition VIN = EN = 3.6 V, VOUT = 5.5 V.
DC/DC STAGE
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VFB
Feedback voltage
1.182
1.2
1.218
V
Maximum line regulation
2.3 V
≤ VIN ≤ 6.0 V
0.5
%
Maximum load regulation
0.5
%
f
Oscillator frequency
3500
kHz
High side switch on resistance
200
m
rDS(on)
Low side switch on resistance
130
m
Reverse leakage current into VOUT
EN = GND
3.5
A
ILIM pin set to VIN
1500
mA
IIN(DC)
Programmable input average switch current limit
ILIM pin set to GND
100
mA
RILIM = 20 kΩ (500mA)
-10
+10
%
PFM enabled, device is not switching
30
A
IQ
Quiescent current
SNOOZE mode, IOUT = 0 mA, current into
2
A
VIN pin
VIN turned on when EN is connected to
ISD
Shutdown current(1)
0.85
3.5
mA
GND and no voltage is present at VOUT
Falling
6.4
V
OVP
Input over voltage protection threshold
Rising
6.5
V
CONTROL STAGE
Falling
2.0
2.1
V
VUVLO Under voltage lockout threshold
Hysteresis
0.1
V
VIL
EN input low voltage
2.3 V
≤ VIN ≤ 6.0 V
0.4
V
VIH
EN input high voltage
2.3 V
≤ VIN ≤ 6.0 V
1.0
V
EN, PG input leakage current
Clamped on GND or VIN
0.5
A
Rising referred to VFB
92.5
95
97.5
%
Power Good threshold voltage
Falling referred to VOUT
2.3
V
Power good delay
50
s
Overtemperature protection
140
°C
Overtemperature hysteresis
20
°C
(1)
When the power good threshold is triggered the first time a comparator is turned on to observe the output voltage increasing the
shutdown current.
Copyright 2010, Texas Instruments Incorporated
3
Product Folder Link(s): TPS61251
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