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부품번호 | AT73C239 기능 |
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기능 | Power Management and Analog Companions | ||
제조업체 | ATMEL Corporation | ||
로고 | |||
전체 30 페이지수
Features
• MawinwSwu.DpaptalySh3e.0etV4Uto.co3m.6V
• Independent 2.5V to 3.6V Auxiliary Supply for Backup Section
• Internal State Machine for Startup
• 25 mA/1.8V-2.75V Linear Low Drop Out Regulator with High PSRR and Low Noise
(LDO1)
• 30 mA/1.5V-1.8V Linear Low Drop Out Regulator with High PSRR and Low Noise
(LDO2)
• 60 mA/1.23V-1.5V-1.8V Linear Low Drop Out Regulator with High PSRR (LDO3)
• 2 mA/1.2V-1.5V-1.8V Linear Low Drop Out Regulator with Very Low Quiescent Current
(LDO4)
• HPBG Economic High Performance Voltage Reference for LDO Supply to RF Sections
• LPBG Low Power Voltage Reference to LDO4 During Backup Battery Operation
• Internal Oscillator Generates Internal Master Clock
• Internal Reset Generator for Main Supply
• Additional External Reset Input
• Two Wire Interface (TWI) for Independent Activation and Output Voltage Programming
for Each LDO
• Available in 3 x 3 x 0.9 mm 16-pin QFN Package
• Applications: GPS Modules, WLAN Devices, Wireless Modules
1. Description
The AT73C239 is a four-channel Power Supply Power Management Unit (PMU) avail-
able in a QFN 3 x 3 mm package. It is a fully integrated, low cost, combined Power
Management device for wireless modules, GPS and WLAN devices. It integrates four
Linear Low Drop Out (LDO) Regulators, three of which provide high-accuracy RF per-
formance and one (LDO4) with very low quiescent current that is supplied by an
external backup battery. A Low Power Bandgap (LPBG) requiring no external capaci-
tor for decoupling, is used as reference voltage for LDO4 and starts when VBAT is
present. LDO4 regulates output voltage with extremely low quiescent current, maxi-
mizing the lifetime of the backup battery. An Internal State Machine manages the
startup of the other LDOs in the order of LDO3 then LDO1 then LDO2. An economic
High Power Bandgap (HPBG) provides highly accurate, low noise voltage reference
to LDOs 1, 2, 3. HPBG operates in switching mode thereby decreasing its current con-
sumption and becomes inactive when not directly supplied by VIN current. When the
RF LDOs are in idle mode, quiescent current is decreased to a minimum.
The AT73C239 features a Two-wire Interface (TWI) to increase the efficiency of the
system by disabling LDOs when not needed.
Power
Management
and Analog
Companions
(PMAAC)
AT73C239
4-channel
Power
Management for
Wireless
Modules
6201C–PMAAC–31-Jul-07
4. Package
www.DataSheet4U.com
4.1 16-pin QFN Package Outline
Figure 4-1 shows the orientation of the 16-pin QFN package.
Figure 4-1. 16-pin QFN Package - Bottom View
13 14 15 16
12 1
11 2
10 3
94
8765
4 AT73C239
6201C–PMAAC–31-Jul-07
4페이지 AT73C239
6.2 LDO2
www.DataSheet4U.com
LDO2 is a 30 mA/1.5V-1.8V linear low drop out regulator with RF performance. LDO2 operates
with supply from 3.0V to 3.6V and needs at least 300 mV of minimum drop-out. LDO2supplies
the RF section of wireless devices, showing high PSRR up to 100 kHz and very low noise on
wide frequency bandwidth. LDO2 requires a 1 µF output capacitor.
Figure 6-2. LDO2 Functional Diagram
current
reference
VBG
VDD2
VIN
VO2
overcurrent
detection
sel2
COUT2
GNDA
onldo2
AVSS
GNDA
6201C–PMAAC–31-Jul-07
7
7페이지 | |||
구 성 | 총 30 페이지수 | ||
다운로드 | [ AT73C239.PDF 데이터시트 ] |
당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는 |
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 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
AT73C237 | Power Management and Analog Companions | ATMEL Corporation |
AT73C239 | Power Management and Analog Companions | ATMEL Corporation |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |