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参数资料
| 型号： | SP6205EM5-L-3-0 |
| 厂商： | Exar Corporation |
| 文件页数： | 9/14页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3V .5A SOT23-5 |
| 标准包装： | 250 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 3V |
| 输入电压： | 最高 5.5V |
| 电压 - 压降（标准）： | 0.3V @ 500mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 500mA |
| 电流 - 限制（最小）： | 550mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 散装 |
| 其它名称： | 1016-1207 |
S P 6 2 0 3 / S P 6 2 0 5
3 0 0 m A / 5 0 0 m A L o w N o i s e C M O S L D O R e g u l a t o r s
THEORY OF OPERATION
G ENERAL O VERVIEW
The SP6203/6205 is intended for applications
where very low dropout voltage, low supply
current and low output noise are critical, even
with high load conditions (500mA maximum).
Unlike bipolar regulators, the SP6203/6205
(CMOS LDO) supply current increases only
slightly with load current.
The SP6203/6205 contains an internal
bandgap reference which is fed into the
inverting input of the LDO-amplifier. The
output voltage is then set by means of a
resistor divider and compared to the bandgap
reference voltage. The error LDO-amplifier
drives the gate of a P-channel MOSFET pass
device that has a R DS(ON) of 0.6 ? at 500mA
producing a 300mV drop at the output.
Furthermore, the SP6203/6205 has its own
current limit circuitry (500mA/850mA) to
ensure that the output current will not damage
the device during output short, overload or
start-up.
Also, the SP6203/6205 includes thermal shut-
down circuitry to turn off the device when the
junction temperature exceeds 170°C and it re-
mains off until the temperature drops by 12°C.
E NABLE /S HUTDOWN O PERATION
The SP6203/6205 is turned off by pulling the
V EN pin below 0.4V and turned on by pulling it
above 1.6V.
If this enable/shutdown feature is not
required, it should be tied directly to the input
supply voltage to keep the regulator output on
at all time.
While in shutdown, V OUT quickly falls to zero
(turn-off time is dependent on load conditions
and output capacitance on V OUT ) and power
consumption drops nearly to zero.
I NPUT C APACITOR
A small capacitor of 2.2μF is required from V IN
to GND if a battery is used as the power
source. Any good quality electrolytic, ceramic
or tantalum capacitor may be used at the
input.
O UTPUT C APACITOR
An output capacitor is required between V OUT
and GND to prevent oscillation. A 2.2μF output
capacitor is recommended.
Larger values make the chip more stable
which means an improvement of the
regulator’s transient response. Also, when
operating from other sources than batteries,
supply-noise rejection can be improved by
increasing the value of the input and output
capacitors and using passive filtering
techniques.
For a lower output current, a smaller output
capacitance can be chosen.
Finally, the output capacitor should have an
effective series resistance (ESR) of 0.5 ? or
less.
Therefore, the use of good quality ceramic or
tantalum capacitors is advised.
B YPASS C APACITOR
A bypass pin (BYP) is provided to decouple the
bandgap reference. A 10nF external capacitor
connected from BYP to GND reduces noise
present on the internal reference, which in
turn significantly reduces output noise and
also improves power supply rejection. Note
that the minimum value of C OUT must be
increased to maintain stability when the
bypass capacitor is used because C BYP reduces
the regulator phase margin. If output noise is
not a concern, this input may be left
unconnected. Larger capacitor values may be
used to further improve power supply
rejection, but result in a longer time period
(slower turn on) to settle output voltage when
power is initially applied.
N O L OAD S TABILITY
The SP6203/6205 will remain stable and in
regulation with no external load (other than
the internal voltage driver) unlike many other
voltage regulators. This is especially important
in CMOS RAM battery back-up applications.
T URN O N T IME
The turn on response is split up in two
separate response categories: the wake up
? 2012 Exar Corporation
9/14
Rev. 2.0.0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SP6205EM5-L-3-0/TR | 功能描述:低压差稳压器 - LDO Low Noise 500mA CMOS LDO Regulators RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| SP6205EM5-L-3-3 | 功能描述:低压差稳压器 - LDO Micropower, 500mA CMOS LDO Regulators RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| SP6205EM5-L-3-3/TR | 功能描述:低压差稳压器 - LDO Low Noise 500mA CMOS LDO Regulators RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| SP6205EM5-L-ADJ | 制造商:Exar Corporation 功能描述:V REG LDO 0.5A ADJ 6205 SOT-23-5 制造商:Exar Corporation 功能描述:V REG, LDO 0.5A ADJ, 6205, SOT-23-5 制造商:Exar Corporation 功能描述:IC, ADJ LDO VOLT REG, 0.5A, 5-SOT-23; Primary Input Voltage:6V; Dropout Voltage Vdo:300mV; No. of Pins:5; Output Current:500mA; Operating Temperature Min:-40C; Operating Temperature Max:125C; Filter Terminals:Surface Mount ;RoHS Compliant: Yes |
| SP6205EM-L-2-85 | 制造商:Exar Corporation 功能描述:V REG LDO 0.5A +2.85V 6205 DFN-8 |
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