Micro PMU with 0.8 A Buck, Two 300 mA LDOs
Su ervisor Watchdo and Manual Reset
Data Sheet
ADP5042
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
F x 7 1 4 1 11
? 1 -2 11An l
vi
In Allri h r rv
FEATURES
Input voltage range: 2.3 V to 5.5 V
One 0.8 A buck regulator
Two 300 mA LDOs
20-lead, 4 mm ?4 mm LFCSP package
Initial regulator accuracy: ?%
Overcurrent and thermal protection
Soft start
Undervoltage lockout
Open drain processor reset with threshold monitoring
?.5% threshold accuracy over the full temperate range
Guaranteed reset output valid to VCC = 1 V
Dual watchdog for secure systems
Watchdog 1 controls reset
Watchdog 2 controls reset and regulators power cycle
Buck key specifications
Current mode topology for excellent transient response
3 MHz operating frequency
Uses tiny multilayer inductors and capacitors
Mode pin selects forced PWM or auto PFM/PSM modes
100% duty cycle low dropout mode
LDOs key specifications
Low VIN from 1.7 V to 5.5 V
Stable with1 礔 ceramic output capacitors
High PSRR, 60 dB PSRR up to 1 kHz/10 kHz
Low output noise
110 礦 rms typical output noise at VOUT = 2.8 V
Low dropout voltage: 150 mV at 300 mA load
40癈 to +125癈 junction temperature range
HIGH LEVEL BLOCK DIAGRAM
FPWM
PSM/PWM
MODE
SW
VOUT1
PGND
C6
10礔
V
OUT1
AT
800mA
L1
1礖
EN_BK
BUCK
EN_LDO1
LDO1
(DIGITAL)
EN_LDO2
LDO2
(ANALOG)
VIN1
EN3
AVIN
AVIN
EN1
VIN2
VIN3
EN2
AGND
C2
1礔
VOUT2
VOUT3
WSTAT
WDI1
WDI2
nRSTO
V
OUT2
AT
300mA
C4
1礔
V
OUT3
AT
300mA
C5
4.7礔
ON
OFF
ON
OFF
ON
OFF
N1 = 2.3V
TO 5.5V
AVIN
R
FILT
= 30&
N2 = 1.7V
TO 5.5V
MR
C1
1礔
N3 = 1.7V
TO 5.5V
C3
1礔
Figure 1.
GENERAL DESCRIPTION
The ADP5042 combines one high performance buck regulator
and two low dropout regulators (LDO) in a small 20-lead
LFCSP to meet demanding performance and board space
requirements.
The high switching frequency of the buck regulator enables
use of tiny multilayer external components and minimizes the
board space.
The MODE pin selects the buck mode of operation. When set
to logic high, the buck regulators operate in forced PWM mode.
When the MODE pin is set to logic low, the buck regulators
operate in PWM mode when the load is around the nominal
value. When the load current falls below a predefined threshold
the regulator operates in power save mode (PSM) improving
the light-load efficiency.
The low quiescent current, low dropout voltage, and wide input
voltage range of the ADP5042 LDOs extend the battery life of
portable devices. The two LDOs maintain power supply
rejection greater than 60 dB for frequencies as high as 10 kHz
while operating with a low headroom voltage.
Each regulator is activated by a high level on the respective
enable pin. The ADP5042 is available with factory programmable
default output voltages and can be set to a wide range of options.
The ADP5042 contains supervisory circuits that monitor
power supply voltage levels and code execution integrity in
microprocessor-based systems. They also provide power-on
reset signals. An on-chip dual watchdog timer can reset the
microprocessor or power cycle the system (Watchdog 2) if it
fails to strobe within a preset timeout period.
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
ADT6402SRJZ-RL7
IC TEMP SENS TRIP PT PP SOT-23-6
ADT6501SRJZP085RL7
IC TEMP SENSOR MICROPWR SOT23-5
ADT7302ARTZ-500RL7
IC SENSOR TEMP 13BIT DGT SOT23-6
ADT7310TRZ
IC TEMP SENSOR 16BIT SPI 8SOIC
ADT7461AARMZ-R
IC TEMP SENSOR DGTL 2CH 8-MSOP
ADT7461ARMZ-2R
IC TEMP SENSOR DGTL 2CH 8-MSOP
ADT7463ARQZ-REEL
IC REMOTE THERMAL CTRLR 24-QSOP
ADT7476AARQZ-R
IC REMOTE THERMAL CTLR 24QSOP
相关代理商/技术参数
ADP5042CP-1-EVALZ
功能描述:电源管理IC开发工具 Output Buck Regulator + Dual Fixed Eval RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V
ADP5042CP-2-EVALZ
功能描述:电源管理IC开发工具 Output Buck Regulator + Dual Fixed Eval RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V
ADP5043ACPZ-1-R7
功能描述:IC REG DL BUCK/LINEAR 20LFCSP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 + 切换式 系列:- 标准包装:2,500 系列:- 拓扑:降压（降压）同步（3），线性（LDO）（2） 功能:任何功能 输出数:5 频率 - 开关:300kHz 电压/电流 - 输出 1:控制器 电压/电流 - 输出 2:控制器 电压/电流 - 输出 3:控制器 带 LED 驱动器:无 带监控器:无 带序列发生器:是 电源电压:5.6 V ~ 24 V 工作温度:-40°C ~ 85°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:*
ADP5043CP-1-EVALZ
功能描述:BOARD EVAL ADP5043CP-1 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:* 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969
ADP50450003CBZR
制造商:Analog Devices 功能描述:
ADP50460008CBZR
制造商:Analog Devices 功能描述:
ADP5050
制造商:AD 制造商全称:Analog Devices 功能描述:5-Channel Integrated Power Solution with Quad Buck Regulators and 200 mA LDO Regulator
ADP5050ACPZ-R7
功能描述:PMIC 解决方案 Adj 12V uPMU 4Buck+LDO+I2C I/F
RoHS:否 制造商:IDT 安装风格: 封装 / 箱体: 封装: