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ST755CのメーカーはSTMicroelectronicsです、この部品の機能は「Adjustable inverting negative output current mode PWM regulators」です。 |
部品番号 | ST755C |
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部品説明 | Adjustable inverting negative output current mode PWM regulators | ||
メーカ | STMicroelectronics | ||
ロゴ | |||
このページの下部にプレビューとST755Cダウンロード(pdfファイル)リンクがあります。 Total 16 pages
ST755C
Adjustable inverting negative output
current mode PWM regulators
Features
■ 2.7V to 11V input to adjustable negative output
conversion
■ 1W guaranteed output power
www.DataSheet4U.com(VI > 4.5V, TA ≤70°C)
■ 68% typ. efficiency at 6V
■ Very low quiescent current: 1.2mA in on mode,
10µA in shut down mode
■ Soft start
■ Very low noise output
■ 160KHz fixed frequency oscillator
■ Mixed bipolar-CMOS technology
Description
The ST755 is an adjustable inverting switch-mode
DC-DC regulator with internal Power MOSFET
that generators an adjustable negative output
from a voltage input of 2.7V to 11V, output current
guaranteed at 200mA (for VI > 4.5V, VO = -5V
SO-8
and TA = 0°C to 70°C) and 275mA (typical value
at TA = 25°C, VO = -5V).
A logic controlled shut down pin that interfaces
directly with microprocessor reduces supply
current to only 10mA. Input to Output differential
voltage is limited to VI+|VO|<12.7V. No load
supply current is 1.2mA
Table 1.
Device summary
Part number
ST755C
July 2007
Package
ST755CD-TR
Rev. 5
Packaging
SO-8 (tape & reel)
1/16
www.st.com
16
1 Page ST755C
1 Diagram
Figure 1. Schematic diagram
www.DataSheet4U.com
Diagram
3/16
3Pages Electrical characteristics
4 Electrical characteristics
ST755C
Table 5.
Symbol
Electrical characteristics (Refer to the test circuits, VCC = 5V, VO = -5.25 to -4.75V,
ILOAD = 0mA, TA = TMIN to TMAX, unless otherwise specified. Typical value are referred at
TA = 25°C)
Parameter
Test conditions
Min. Typ. Max. Unit
VI Input voltage
VO Output voltage
www.DataSheet4U.comIO Output current
ISUPPLY
Supply current (including
switching current)
IOFF Standby current)
ISC Short circuit current)
ΔVO Line regulation
ΔVO Load regulation
VREF Reference voltage
ΔVREF Reference drift
RDSON LX on resistance
ILEAK LX leakage current)
ISH Shutdown pin current)
VIH SHDN input high threshold
VIL SHDN input low threshold
fOSC Oscillator frequency
h Power efficiency
CC
Compensation pin
impedance
VCC = 4.5 to 6.2V, IO =0 to 200mA
VCC = 4.5 to 6.2V, TA = 0 to 70°C
VCC = 4.5 to 6.2V, TA = -40 to 85°C
VCC = 4V, VO = -5V
VCC = 2.7V, VO = -5V
No Load, VSHDN = VCC
No Load, VSHDN = 0V
VCC = 4 to 6.2V
IO = 0 to 200mA
TA = 25°C
TA = TMIN to TMAX
VDS = 10V
IO =100mA
4 11
4.75 5 5.25
200 275
175
175
125
V
V
mA
1.2 3.5 mA
10 100 µA
1.2 A
0.1 %/V
0.003
%/mA
1.18 1.25 1.32
V
50 ppm/°C
0.7 Ω
1 µA
1 µA
2V
0.25 V
160 KHz
68 %
7.5 KΩ
Note:
Do not overload or short the Output to Ground. If the above conditions are observed, the
device may be damaged.
6/16
6 Page | |||
ページ | 合計 : 16 ページ | ||
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PDF ダウンロード | [ ST755C データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
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