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| 型号： | CS5253B-8GDPR5 |
| 厂商： | ON Semiconductor |
| 文件页数： | 6/9页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 2.5V 3A D2PAK-5 |
| 产品变化通告： | Product Obsolescence 12/Apr/2006 |
| 标准包装： | 750 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 2.5V |
| 输入电压： | 最高 13V |
| 电压 - 压降（标准）： | 1.05V @ 3A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 3A |
| 电流 - 限制（最小）： | 3.1A |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-263-6，D²Pak（5 引线+接片），TO-263BA |
| 供应商设备封装： | D2PAK-5 |
| 包装： | 带卷 (TR) |
| 其它名称： | CS5253B-8GDPR5OS |
CS5253B ? 8
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5
V POWER = 3.3 V
V CONTROL = 5.0 V
I LOAD = 0 to 3.0 A
V OUT = 2.5 V
V OUT Shorted to V SENSE
T J = 0 ° C to 150 ° C
4
Unstable
3
2
Stable Region
1
0
0
10
20
30
40
50
60
70
80
90
100
Capacitance ( m F)
Figure 15. Stability vs ESR
APPLICATIONS NOTES
THEORY OF OPERATION
The CS5253B ? 8 linear regulator is fixed at 2.5 V at
currents up to 3.0 A. The regulator is protected against short
circuits, and includes a thermal shutdown circuit with
hysteresis. The output, which is current limited, consists of
a PNP ? NPN transistor pair and requires an output capacitor
for stability.
V POWER Function
The CS5253B ? 8 utilizes a two supply approach to
maximize efficiency. The collector of the power device is
brought out to the V POWER pin to minimize internal power
dissipation under high current loads. V CONTROL provides
for the control circuitry and the drive for the output NPN
transistor. V CONTROL should be at least 1.0 V greater than
the output voltage. Special care has been taken to ensure that
there are no supply sequencing problems. The output
voltage will not turn on until both supplies are operating. If
the control voltage comes up first, the output current will be
limited to about three milliamperes until the power input
voltage comes up. If the power input voltage comes up first,
the output will not turn on at all until the control voltage
comes up. The output can never come up unregulated.
The CS5253B ? 8 can also be used as a single supply device
with the control and power inputs tied together. In this mode,
the dropout will be determined by the minimum control
voltage.
Output Voltage Sensing
The CS5253B ? 8 five terminal linear regulator includes a
dedicated V SENSE function. This allows for true Kelvin
sensing of the output voltage. This feature can virtually
eliminate errors in the output voltage due to load regulation.
Regulation will be optimized at the point where the sense pin
is tied to the output.
DESIGN GUIDELINES
Remote Sense
Remote sense operation can be easily obtained with the
CS5253B ? 8 but some care must be paid to the layout and
positioning of the filter capacitors around the part. The
ground side of the input capacitors on the +5.0 V and +3.3 V
lines and the local V OUT ? to ? ground output capacitor on the
IC must be tied close to the ground pin of the regulator. This
will establish the stability of the part. The IC ground may
then be connected to ground remotely at the load, giving the
ground portion remote sense operation.
The V SENSE line can then be tied remotely at the positive
load connection, giving the feedback remote sense
operation. The remote sense lines should be Kelvin
connected so as to eliminate the effect of load current
voltage drop. An optional bypass capacitor may be used at
the load to reduce the effect of load variations and spikes.
Current Limit
The internal current limit circuit limits the output current
under excessive load conditions.
Short Circuit Protection
The device includes short circuit protection circuitry that
clamps the output current at approximately 500mA less than
its current limit value. This provides for a current foldback
function, which reduces power dissipation under a direct
shorted load.
Thermal Shutdown
The thermal shutdown circuitry is guaranteed by design to
activate above a die junction temperature of approximately
150 ° C and to shut down the regulator output. This circuitry
has 25 ° C of typical hysteresis, thereby allowing the
regulator to recover from a thermal fault automatically.
http://onsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CS5253B-8GDPR5G | 功能描述:IC REG LDO 2.5V 3A D2PAK-5 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 稳压器拓扑结构:正，固定式 输出电压:3.1V 输入电压:最高 5.5V 电压 - 压降（标准）:- 稳压器数量:1 电流 - 输出:300mA 电流 - 限制（最小）:420mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 供应商设备封装:TSOT-23-5 包装:带卷 (TR) |
| CS5257A-1 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:7.0 A LDO 5−Pin Adjustable Linear Regulator |
| CS5257A-1/D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:7A LDO 5-Pin Adjustable Linear Regulator |
| CS5257A1GDP5 | 制造商:ON SEMI 功能描述:New |
| CS5257A-1GDP5 | 功能描述:IC REG LDO ADJ 7A D2PAK-5 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:3,000 系列:- 稳压器拓扑结构:正，固定式和可调式 输出电压:3.3V，1.25 V ~ 5.7 V 输入电压:4.5 V ~ 7 V 电压 - 压降（标准）:1.1V @ 1A 稳压器数量:2 电流 - 输出:1A 电流 - 限制（最小）:1A 工作温度:0°C ~ 125°C 安装类型:表面贴装 封装/外壳:TO-252-5，DPak（4 引线 + 接片），TO-252AD 供应商设备封装:PPAK 包装:管件 其它名称:497-3576-5 |
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