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參數(shù)資料
| 型號： | 935270485518 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 固定正電壓單路輸出LDO穩(wěn)壓器 |
| 英文描述： | 3.3 V FIXED POSITIVE LDO REGULATOR, 0.3 V DROPOUT, PDSO7 |
| 封裝： | SOP-7 |
| 文件頁數(shù)： | 2/8頁 |
| 文件大?。?/td> | 79K |
| 代理商： | 935270485518 |
Philips Semiconductors
Product data
SA57026
300 mA LDO with ON/OFF control and
independent delayed RESET function
2
2001 Oct 03
853–2292 27197
GENERAL DESCRIPTION
The SA57026 has an extremely precise fixed output with a typical
accuracy of
±2%. It is designed to provide very low dropout and low
noise in CD-ROM drives, battery-operated systems, and portable
computers applications. This regulator consists of an internal
voltage reference, an error amplifier, a driver with current limiter, and
a thermal shut-down mechanism.
An Active-LOW RESET is assered when the detected voltage
(VDET) falls below the reset voltage threshold. The RESET output
remains low for 30
s (typical) when zero capacitance connected to
Cd pin. The reset time delay can be adjusted by replacing
cpacitance values from Cd pin to Ground.
The device is available in the SOP-7B package.
FEATURES
Very low dropout voltage: 500 mV typ. (I
out = 50 mA)
High precision output voltage: ±2%
Output current capacity: 300 mA
Low noise: 40 mV
rms typ. @ 20 Hz to 80 KHz and for Cn = 10 nF
Extremely good line regulation: 10 mV typical
Extremely good load regulation: 20 mV typical
Low temperature drift co-efficient to V
out: ±100 ppm/°C
Internal current limit and thermal shut-down circuits
Adjustment-free reset detection voltage: 4.2 V typ.
Delay time can be adjusted by external capacitor
Wide operating temperature range: –40 °C to +85 °C
APPLICATIONS
CD-ROM drives
Electronic notebooks, PDAs and palmtop computers
Cameras, VCRs and camcorders
PCMCIA cards
Modems
Battery-operated or hand-held instruments
BLOCK DIAGRAM
2
1
7
5
4
THERMAL
PROTECT
3
VIN
VOUT
RESET
GND
Cd
ON/OFF
SL01528
Figure 1. Block diagram.
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