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ZLDO270
PIN DEFINITIONS
Pin 1
LBF - Low Battery Flag. An open collector
NPN output which pulls low on failing input
supply.
Pin 2
SC - Shutdown Control. This high
impedance logic compatible input disables the
regulator when taken high. It includes a diode
wired to Vin and so will pass current if taken more
than 0.5V above Vin.
Pin 3
Vin - Voltage Input. The power supply to
the regulator. The permissible input voltage
range is -0.3 to 20V. An input capacitor is not
mandatory but will be useful in reducing the
coupling of noise from input to output and
minimising the effect of sudden changes in load
current on the input voltage.
Pin 4
N/C - Not Connected. Not internally
connected and so can be left open or wired to any
pin without affecting the performance of the
regulator.
Pin 5
Vout - Voltage Output. The output of the
regulator. An output capacitor of 1uF or greater
and having low ESR should be wired in close
proximity to the regulator to ensure stability for
all loads.
Pin 6
D/C - Do Not Connect. This pin is wired to
an internal circuit node of the regulator. No
external connection should be made to this pin.
Pin 7
Gnd - Ground. The ground connection of
the regulator against which the output voltage is
referenced.
Pin 8
Spg - Shaping. The shaping node for the
error amplifier of the regulator. A capacitor of
10pF wired from this pin to the output pin (pin 5)
gives optimum stability. Improved AC can be
achieved by reducing the value of this capacitor
but stability may be impaired for some load
conditions.
NOTES.
1.
Maximum power dissipation of the device is calculated assuming the package is mounted on a PCB
measuring 2 inches square.
2
Output voltage temperature coefficient is calculated as:-
V
O
change x 1000000
V
O
x temperature change
3
. Dropout voltage is defined as the input to output voltage differential at which the circuit ceases to
regulate. The value is measured when the output voltage has dropped by 100mV from V
out
measured
at the nominal input V
in
= V
out
+ 1V
4.
Guaranteed by design.
FUNCTIONAL DESCRIPTION
The ZLDO is a high performance, ultra low dropout, low quiescent regulator. Available in SM8 surface
mount packaging, the device is able to dissipate 2W(note 1) allowing complete design flexibility with
an input span upto 20V and 300mA output current. The device quiescent is 1mA (typ) at 300mA load
current. A low battery comparator signifies impending battery failure, whilst a shutdown function
reduces quiescent current to a mere 11
μ
A (typ). A precision bandgap reference gives
±
2.5% output
tolerance and good temperature characteristics over the range -40 to +85°C. AC performance is
enhanced via the use of a small external capacitor.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ZLDO285T8TA | 功能描述:IC REG LDO 2.85V .3A SOT223-8 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:3,000 系列:- 穩(wěn)壓器拓撲結(jié)構(gòu):正，固定式和可調(diào)式 輸出電壓:3.3V，1.25 V ~ 5.7 V 輸入電壓:4.5 V ~ 7 V 電壓 - 壓降（標準）:1.1V @ 1A 穩(wěn)壓器數(shù)量:2 電流 - 輸出:1A 電流 - 限制（最?。?1A 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:TO-252-5，DPak（4 引線 + 接片），TO-252AD 供應(yīng)商設(shè)備封裝:PPAK 包裝:管件 其它名稱:497-3576-5 |
| ZLDO300 | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:3.0 VOLT ULTRA LOW DROPOUT REGULATOR |
| ZLDO300T8 | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:3.0 VOLT ULTRA LOW DROPOUT REGULATOR |
| ZLDO300T8TA | 功能描述:IC REG LDO 3V .3A SOT223-8 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:3,000 系列:- 穩(wěn)壓器拓撲結(jié)構(gòu):正，固定式和可調(diào)式 輸出電壓:3.3V，1.25 V ~ 5.7 V 輸入電壓:4.5 V ~ 7 V 電壓 - 壓降（標準）:1.1V @ 1A 穩(wěn)壓器數(shù)量:2 電流 - 輸出:1A 電流 - 限制（最?。?1A 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:TO-252-5，DPak（4 引線 + 接片），TO-252AD 供應(yīng)商設(shè)備封裝:PPAK 包裝:管件 其它名稱:497-3576-5 |
| ZLDO330 | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:3.3 VOLT ULTRA LOW DROPOUT REGULATOR |
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