UCC283_TI 具有反向电流保护功能的 3A、9V 超低压降稳压器，-40°C 至 +85°C

UCC283的基本参数

制造厂商：TI
产品类别：电源管理
技术类目：线性和低压降 (LDO) 稳压器
功能描述：具有反向电流保护功能的 3A、9V 超低压降稳压器，-40°C 至 +85°C
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UCC283的产品详情：

The UCC283–3/–5/–ADJ family of positive linear series pass voltage regulators are tailored for low-drop-out applications where low quiescent power is important. Fabricated with a BiCMOS technology ideally suited for low input-to-output differential applications, the UCC283–5 passes 3 A while requiring only 0.45 V of typical input voltage headroom (ensured 0.6-V dropout).

These regulators include reverse voltage sensing that prevents current in the reverse direction. Quiescent current is always less than 650 µA. These devices have been internally compensated in such a way that the need for a minimum output capacitor has been eliminated.

UCC283–3 and UCC283–5 versions are in 3-lead packages and have preset outputs at 3.3 V and 5.0 V respectively. The output voltage is regulated to 1.5% at room temperature. The UCC283–ADJ version, in a 5-lead package, regulates the output voltage programmed by an external resistor ratio.

Short-circuit current is internally limited. The device responds to a sustained overcurrent condition by turning off after a t_ON time delay. The device then stays off for a period, t_OFF, that is 32 times the t_ON delay. The device then begins pulsing on and off at the t_ON/(t_ON +t_OFF) duty cycle of 3%. This drastically reduces the power dissipation during short-circuit and means heat sinks need only accommodate normal operation. On the 3-leaded versions of the device t_ON is fixed at 750 µs, on the adjustable 5-leaded versions an external capacitor sets the on time. The off time is always 32 × t_ON. The external timing control pin, CT, on the 5-leaded versions also serves as a shutdown input when pulled low.

Internal power dissipation is further controlled with thermal overload protection circuitry. Thermal shutdown occurs if the junction temperature exceeds 165°C. The chip remains off until the temperature has dropped 20°C.

The UCC283 series is specified for operation over the industrial range of –40°C to 85°C, and the UCC383 series is specified from 0°C to 70°C. These devices are available in 3- and 5-pin TO–220 and TO–263 power packages.

UCC283的优势和特性：

Precision Positive Linear Series Pass Voltage Regulation
0.45 V Dropout at 3 A
50 mV Dropout at 10 mA
Quiescent Current Under 650 μA Irrespective of Load
Adjustable (5-Lead) Output Voltage Version
Fixed (3-Lead) Versions for 3.3-V and 5-V Outputs
Logic Shutdown Capability
Short-Circuit Power Limit of (3% × VIN × ISHORT)
Low VOUT to VIN Reverse Leakage
Thermal Shutdown

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UCC283的参数（英文）：

Output options
Adjustable Output, Fixed Output
Iout (Max) (A)
3
Vin (Max) (V)
9
Vin (Min) (V)
2.8
Vout (Max) (V)
8.5
Vout (Min) (V)
1.2
Fixed output options (V)
3.3, 5
Iq (Typ) (mA)
0.4
Thermal resistance θJA (°C/W)
70
Rating
Catalog
Load capacitance (Min) (μF)
10
Regulated outputs (#)
1
Features
Reverse current protection
Accuracy (%)
2.5
PSRR @ 100 KHz (dB)
18
Dropout voltage (Vdo) (Typ) (mV)
400
Operating temperature range (C)
-40 to 85

UCC283具体的完整产品型号参数及价格（美元）：

UCC283的完整型号有：UCC283T-ADJ、UCC283TDKTTT-5、UCC283TDTR-3、UCC283TDTR-ADJ，以下是这些产品的关键参数及官网采购报价：

UCC283T-ADJ，工作温度：PropertyValue，封装：TO-220 (KC)-5，包装数量MPQ：50个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SN，TI官网UCC283T-ADJ的批量USD价格：3.641（1000+）

UCC283TDKTTT-5，工作温度：-40 to 85，封装：DDPAK/TO-263 (KTT)-3，包装数量MPQ：50个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：SN，TI官网UCC283TDKTTT-5的批量USD价格：3.059（1000+）

UCC283TDTR-3，工作温度：PropertyValue，封装：DDPAK/TO-263 (KTT)-3，包装数量MPQ：500个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：SN，TI官网UCC283TDTR-3的批量USD价格：3.059（1000+）

UCC283TDTR-ADJ，工作温度：-40 to 85，封装：DDPAK/TO-263 (KTT)-5，包装数量MPQ：500个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：SN，TI官网UCC283TDTR-ADJ的批量USD价格：3.059（1000+）

UCC283的评估套件：

UCC283的电路图解：

UCC283的评估套件：