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參數(shù)資料
| 型號： | SC1592IMTR |
| 元件分類： | 可調(diào)正電壓單路輸出LDO穩(wěn)壓器 |
| 英文描述： | ADJUSTABLE POSITIVE LDO REGULATOR, 0.52 V DROPOUT, PSSO7 |
| 封裝： | TO-263, DDPAK-7 |
| 文件頁數(shù)： | 15/18頁 |
| 文件大?。?/td> | 293K |
| 代理商： | SC1592IMTR |
6
2004 Semtech Corp.
www.semtech.com
SC1592
POWER MANAGEMENT
Application Information
The SC1592 is a 3A low dropout high performance linear
voltage regulator. The SC1592 can be used for voltage
applications as low as 0.8V and is ideal for down
conversion utilizing dual supply configuration. This allows
for extremely low dropout voltages with excellent load
and line regulation. The SC1592 can be utilized in high
voltage applications, with V
IN and VCNTL up to 16V, providing
there is adequate thermal management.
SC1592 is designed to meet stringent requirements of
current generation microprocessors and other sensitive
electronic devices. This is possible by employing an
additional bias source, V
CNTL. The voltage of this supply
needs to be at least 1.5V greater than the output voltage
in order to achieve low dropout, typically less then
300mV.
Unlike most of the other high current linear regulators,
the SC1592 provides a programmable current limit which
can be set with a single resistor. The value of the
programming resistor is:
LIM
OUT
LIM
R
V
240
I
≈
where I
LIM = selected current limit value
V
OUT = regulated output voltage
R
LIM = programmable current limit resistor
The SC1592 has a fast transient response that allows it
to handle large load changes associated with high current
applications. Proper selection of the of the output
capacitor and it’s ESR value determines stable operation
and optimizes performance.
The typical application shown in Figure 2 was tested with
a wide range of different capacitors. The circuit was found
to be unconditionally stable with capacitor values from
47F to 330F and ESR ranging from 0.5m
to greater
then 75m
.
It’s recommended to maintain 5-10mA through the output
divider network in order to have a tight load and line
regulation. Initial accuracy of the internal voltage
reference V
REF = 0.8V ±1% over full temperature range.
This commands the use of 0.5% or better accuracy
resistors to build a precision power supply.
C1
2.2uF
C2
22uF
R1
C3
100uF
R3
R2
+1.8V Vout
+3.3V Vcntl
+2.5V Vin
SC1592
CNTL
IN
OUT
SENSE
ILIM
EN
GND
10k
66.5
53
100
Figure 2
The circuit in Figure 2 shows a typical application of 2.5V
to 1.8V conversion with a 3.3V control supply and the
load range of up to 3A steady state. Considering the
approximate 2W power being dissipated by the pass
element of the SC1592, we are still able to choose an
SO-8 EDP package with T
JA = 36.5°C/W mount on the
1sq.in. copper pad allocated for adequate heat transfer.
The ambient temperature in this case should not exceed
50°C. If this temperature range is too restrictive, then
the DDPAK can be utilized, having T
JA = 29°C/W mount
on the same size copper pad.
Input capacitor: A minimum of 10F ceramic capacitor
is recommended to be placed directly next to the Vin pin.
This allows for the device being some distance from any
bulk capacitance on the rail. Additionally, bulk
capacitance may be added closely to the input supply
pin of the SC1592 to ensure that Vin does not sag,
improving load transient response.
Output capacitor: A minimum bulk capacitance of 33F,
along with a 0.1F ceramic decoupling capacitor is
recommended. Increasing the bulk capacitance will
improve the overall transient response. The use of
multiple lower value ceramic capacitors in parallel to
achieve the desired bulk capacitance will not cause
stability issues. Although designed for use with ceramic
output capacitors, the SC1592 is extremely tolerant of
output capacitor ESR values and thus will also work
comfortably with tantalum output capacitors.
.
typ
V
8
.
0
V
)
3
R
2
R
1
(
V
REF
OUT
=
+
=
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SC1592IMTRT | 功能描述:IC REG LDO ADJ 3A TO-263-7 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:3V 輸入電壓:最高 6V 電壓 - 壓降（標(biāo)準(zhǔn)）:0.27V @ 150mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:150mA（最?。?電流 - 限制（最?。?- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:帶卷 (TR) 產(chǎn)品目錄頁面:665 (CN2011-ZH PDF) 其它名稱:TC1185-3.0VCT713-NDTC11853.0VCT713TC11853.0VCT713RTRTC11853.0VCT713RTR-NDTC11853.0VCT713TR |
| SC1592IS.TRT | 制造商:SEMTECH 功能描述:I.C. |
| SC1592ISTR | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Low Dropout High Performance Adjustable Positive Voltage Regulator |
| SC1592ISTRT | 功能描述:IC REG LDO ADJ 3A 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:3.3V 輸入電壓:4.7 V ~ 15 V 電壓 - 壓降（標(biāo)準(zhǔn)）:1.2V @ 800mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:800mA（最小值） 電流 - 限制（最?。?800mA 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:TO-252-3，DPak（2 引線+接片），SC-63 供應(yīng)商設(shè)備封裝:PowerFlex/TO-252 包裝:剪切帶 (CT) 其它名稱:296-31967-1 |
| SC15A | 制造商:BOURNS 制造商全稱:Bourns Electronic Solutions 功能描述:Power Module |
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