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AT73C239 데이터시트 PDF




ATMEL Corporation에서 제조한 전자 부품 AT73C239은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


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부품번호 AT73C239 기능
기능 Power Management and Analog Companions
제조업체 ATMEL Corporation
로고 ATMEL Corporation 로고


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AT73C239 데이터시트, 핀배열, 회로
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




AT73C239 pdf, 반도체, 판매, 대치품
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

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AT73C239 전자부품, 판매, 대치품
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

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