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參數資料
| 型號： | UCC284SDR-12EP |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 固定負電壓單路輸出LDO穩壓器 |
| 英文描述： | 12 V FIXED NEGATIVE LDO REGULATOR, 0.5 V DROPOUT, PDSO8 |
| 封裝： | PLASTIC, MS-012AA, SOIC-8 |
| 文件頁數： | 1/21頁 |
| 文件大小： | 506K |
| 代理商： | UCC284SDR-12EP |
1
FEATURES
SUPPORTS DEFENSE, AEROSPACE AND
VIN
SD/CT
VOUT
VIN
VOUTS
VIN
GND
1
2
3
4
8
7
6
5
DESCRIPTION
www.ti.com ....................................................................................................................................... SLVS862A – NOVEMBER 2008 – REVISED NOVEMBER 2008
LOW-DROPOUT 0.5-A NEGATIVE LINEAR REGULATOR
MEDICAL APPLICATIONS
Precision Negative Series Pass Voltage
Controlled Baseline
Regulation
One Assembly/Test Site
0.2-V Dropout at 0.5 A
One Fabrication Site
Wide Input Voltage Range –3.2 V to –15 V
Available in S-Temp (–55°C/100°C)
Low Quiescent Current Irrespective of Load D
Temperature Range(1)
Simple Logic Shutdown Interfacing
Extended Product Life Cycle
–5 V, –12 V, and Adjustable Output
Extended Product-Change Notification
2.5% Duty Cycle Short Circuit Protection
Product Traceability
(1)
Additional temperature ranges are available – contact factory.
D PACKAGE
(FRONT VIEW)
The UCC284-x family of negative linear-series pass regulators is tailored for low-dropout applications where
low-quiescent power is important. Fabricated with a BCDMOS technology ideally suited for low input-to-output
differential applications, the UCC284-x passes 0.5 A while requiring only 0.2 V of input-voltage headroom.
Dropout voltage decreases linearly with output current, so that dropout at 50 mA is less than 20 mV.
Quiescent current consumption for the device under normal (non-dropout) conditions is typically 200
A. An
integrated charge pump is internally enabled only when the device is operating near dropout with low VIN. This
ensured that the device meets the dropout specifications even for maximum load current and a VIN of –3.2 V
with only a modest increase in quiescent current. Quiescent current is always less than 360
A, with the charge
pump enabled. The quiescent current of the UCC284 does not increase with load current.
Short-circuit current is internally limited. The device responds to a sustained overcurrent condition by turning off
after a tON delay. The device then stays off for a period, tOFF, that is 40 times the tON delay. The device then
begins pulsing on and off at the tON/tOFF duty cycle of 2.5%. This drastically reduces the power dissipation during
short circuit such that heat sinking, if at all required, must only accommodate normal operation. An external
capacitor sets the on time. The off time is always 40 times tON.
The UCC284-x can be shutdown to 45
A (maximum) by pulling the SD/CT pin more positive than –0.7 V. To
allow for simpler interfacing, the SD/CT pin may be pulled up to 6 V above the ground pin without turning on
clamping diodes.
Internal power dissipation is further controlled with thermal-overload protection circuitry. Thermal shutdown
occurs if the junction temperature exceeds 140°C. The chip remains off until the temperature has dropped 20°C
(TJ = 120°C).
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 2008, 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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| UCC284SDR-5EP | 功能描述:低壓差穩壓器 - LDO EP Sgl Out LDO,500mA RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| UCC28500 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:BiCMOS PFC/PWM Combination Controller |
| UCC28500-12 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:BiCMOS PFC/PWM COMBINATION CONTROLLER |
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