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參數(shù)資料
| 型號(hào)： | TPS22949ADRGR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類(lèi)： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | 3 X 3 MM, GREEN, PLASTIC, SON-8 |
| 文件頁(yè)數(shù)： | 1/28頁(yè) |
| 文件大?。?/td> | 1001K |
| 代理商： | TPS22949ADRGR |
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www.ti.com
SLVS908C – FEBRUARY 2009 – REVISED JANUARY 2010
CURRENT-LIMITED LOAD SWITCH WITH LOW NOISE REGULATION CAPABILITY
1
FEATURES
DESCRIPTION
Integrated Current Limiter
–
Input Voltage Range: 1.62 V to 4.5 V
The TPS22949 and TPS22949A are devices that
provides
protection
to
systems
and
loads
in
–
Low ON-Resistance
high-current
conditions.
The
device
contains
a
–
rON = 300-m at VIN = 4.5 V
500-m
current-limited P-channel MOSFET that can
–
rON = 350-m at VIN = 3.3 V
operate over an input voltage range of 1.62 V to
4.5 V as well as a low-dropout (LDO) regulator with a
–
rON = 400-m at VIN = 2.5 V
fixed output voltage of 1.8 V.
–
rON = 600-m at VIN = 1.8 V
The switch is controlled by an on/off input (EN1),
–
Integrated 100-mA Minimum Current Limit
which
is
capable
of
interfacing
directly
with
–
Undervoltage Lockout
low-voltage control signals. When the switch current
–
Fast-Current Limit Response Time
reaches
the
maximum
limit,
the
TPS22949/TPS22949A
operates
in
a
–
Integrated Fault Blanking and Auto Restart
constant-current mode to prohibit excessive currents
Stable Without Current Limiter Output
from
causing
damage.
If
the
constant
current
Capacitor (TPS22949A Only)
condition still persists after 12 ms, these devices shut
Integrated Low-Noise RF LDO
off the switch and pull the fault signal pin (OC) low.
The
TPS22949/TPS22949A
has
an
auto-restart
–
Input Voltage Range: 1.62 V to 4.5 V
feature that turns the switch on again after 70 ms if
–
Low Noise: 50
μVrms (10 Hz to 100 kHz)
the EN1 pin is still active.
–
80-dB VIN PSRR (10 Hz to 10 kHz)
The
output
of
the
current
limiter
is
internally
–
Fast Start-Up Time: 130
μs
connected to a RF low-dropout (LDO) regulator that
–
Low Dropout 100 mV at Iload =100 mA
offers good ac performance with very low ground
current, good power-supply rejection ratio (PSRR),
–
Integrated Output Discharge
low noise, fast start-up, and excellent line and load
–
Stable With 2.2-
μF Output Capacitor
transient response. The output of the regulator is
1.8-V Compatible Control Input Threshold
stable with ceramic capacitors. This LDO uses a
precision voltage reference and feedback loop to
ESD Performance Tested Per JESD 22
achieve overall accuracy of 2% over all load, line,
–
3500-V Human-Body Model
process, and temperature variations.
(A114-B, Class II)
The
TPS22949A
integrates
additional
internal
–
1000-V Charged-Device Model
circuitry that increases the current limit of the switch
(C101)
during the power-up sequence. This feature allows
Tiny 8-Terminal YZP Package (1.9 mm ×
the
TPS22949A
to
operate
without
a
storage
0.9 mm, 0.5-mm Pitch, 0.5-mm Height) and
capacitor at the input of the LDO.
SON-8 (DRG) 3.0 mm × 3.0 mm
The TPS22949 and TPS22949A are available in a
space-saving 8-terminal WCSP (YZP) or in a 8-pin
APPLICATIONS
SON package (DRG). Both are characterized for
Fingerprint Module Protection
operation over the free-air temperature range of
Portable Consumer Electronics
–40°C to 85°C.
Smart Phone
Notebooks
Control Access Systems
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright 2009–2010, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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| TPS22949AYZPR | 功能描述:電源開(kāi)關(guān) IC - 配電 Current Ltd Load Sw RoHS:否 制造商:Exar 輸出端數(shù)量:1 開(kāi)啟電阻（最大值）:85 mOhms 開(kāi)啟時(shí)間（最大值）:400 us 關(guān)閉時(shí)間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
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