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부품번호 | LD6904 기능 |
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기능 | 120mA Negative Voltage Linear Regulator | ||
제조업체 | Leadtrend | ||
로고 | |||
전체 12 페이지수
LD6904
3/5/2008
120mA Negative Voltage Linear Regulator
REV: 01
General Description
The LD6904 is a negative voltage, micropower linear
regulator. It features wide input voltage, low-noise,
low-dropout and low-quiescent current. The precision of
feedback reference voltage is within ±1% and output current
reaches up to 120mA. The built-in output current limiting and
thermal shutdown protection could prevent from fault
conditions.
The LD6904 is available in a space saving SOT23-6 or
SC70-6 package.
Features
z ±1.5% feedback reference
z Shutdown current <1μA
z Negative voltage down to -11V
z Thermal shutdown and current limit
z VOUT discharge function
z Soft start operation
Applications
z Microcontroller Power
z Hand-Held Instruments
Typical Application
VIN/-8V
1μF/X5R
VIN OUT
CE LD6904
4.7nF
SS FB
GND
VOUT-7.5V
R1/50K
1μF/X5R
*R2/10K
*R2<15KΩ is recommended
Fig.1 Negative voltage linear regulator application
Leadtrend Technology Corporation
LD6904-DS-01 March 2008
1
www.leadtrend.com.tw
LD6904
Pin Descriptions
PIN NAME
FUNCTION
1 FB Output Feedback. Refer to Fig.1, R2<15K ohm is recommended
2 VIN Input Voltage
3 OUT Regulator Output
Chip Enable, High=Enable, Low=Disable
4 CE Note that this pin is high impedance. There should be a pull low resistor
connected to GND, when this pin is floating.
5 GND IC GND
This pin combines noise reduction and soft start function. Connect a
6 SS
capacitor to GND to adjust soft start time. Css>1nF is recommended.
.
Block Diagram
VIN
-1.25V
Chip Enable
CE
Current limit
and Thermal
Shutdown
VIN
OUT
OUT
SS Soft Start Block
FB
GND
Leadtrend Technology Corporation
LD6904-DS-01 March 2008
4
www.leadtrend.com.tw
4페이지 Typical Performance Characteristics
-1.10
-1.15
-1.20
-1.25
-1.30
-1.35
-1.40
-40 -20 0 20 40 60 80 100
Temperature (°C )
Fig. 1 Reference voltage vs. Temperature
CE
Vcss
Vout
Iin
Fig. 3 Start Up Waveform CSS=10nF
LD6904
70
60
50
40
30
20
10
0
0.01
0.1
1
10 100
Frequency (KHz)
Fig. 2 Ripple Rejection vs. frequency
1000
Vout
Iout
Fig. 4 Load Transient Response
Leadtrend Technology Corporation
LD6904-DS-01 March 2008
7
www.leadtrend.com.tw
7페이지 | |||
구 성 | 총 12 페이지수 | ||
다운로드 | [ LD6904.PDF 데이터시트 ] |
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구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
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