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参数资料
| 型号： | ADP1821ARQZ-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 21/24页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 16-QSOP |
| 标准包装： | 1 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 720kHz |
| 占空比： | 90% |
| 电源电压： | 3.7 V ~ 5.5 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 标准包装 |
| 产品目录页面： | 791 (CN2011-ZH PDF) |
| 其它名称： | ADP1821ARQZ-R7DKR |
ADP1821
APPLICATION CIRCUITS
The ADP1821 controller can be configured to regulate an output
with a load of more than 20 A if the power components, such as
the inductor, MOSFETs, and the bulk capacitors are chosen
carefully to meet the power requirement. The maximum load
and power dissipation are limited by the power-train compo-
nents. Figure 1 shows a typical application circuit that can drive
an output load of 20 A. Note that two low-side MOSFETs are
needed to deliver the 20 A load. In this example, two power rails
are needed: a 5 V bias supply, which needs to supply about 30
mA to power the ADP1821 at full load, and a power input rail,
which ranges from 2.5 V to 20 V. The bulk input and output
capacitors used in this example are Sanyo OSCON? capacitors,
which have low ESR and high current ripple rating. An alternative
Rubycon ZLG low-ESR series, can also be paralleled up at the
input or output to meet the current ripple requirement. Because
the aluminum electrolytic capacitors have higher ESR and much
larger variation in capacitance over the operating temperature
range, a larger bulk input and output capacitance is needed to
reduce the effective ESR and suppress the current ripple.
The ADP1821 can be configured to drive an output load of
less than 1 A. Figure 22 shows a typical application circuit that
drives a 3 A load in an all multilayer ceramic capacitor (MLCC)
solution. Notice that the two MOSFETs used in this example are
dual-channel MOSFETs in a PowerPAK? SO-8 package, which
reduces cost and saves layout space.
to the OSCON capacitors are the polymer aluminum capacitors
that are available from other manufacturers such as United
Chemi-Con. Aluminum electrolytic capacitors, such as the
VIN = 3.7V TO 5.5V
10 ?
1μF
D1
+
C IN1
1μF
10V
+
C IN2
10μF
10V
VCC
PVCC
×2
1μF
ADP1821
100k ?
6.65k ?
SHDN
FREQ
SYNC
PWGD
COMP
BST
DH
SW
CSL
DL
PGND
0.22μF
4.1k ?
M1
L1 = 2.2μH
M2
C OUT1
1μF
10V
C OUT2
47μF
6.3V
C OUT3
100μF
6.3V
OUTPUT
1.8V, 3A
84.5 ?
120pF
SS
GND FB
2k ?
8.2nF
1.5nF
100nF
AGND
1k ?
f SW = 600kHz
C IN2 : MURATA, GRM21BR61A106K
C OUT3 : MURATA, GRM31CR60J107M
M1, M2: VISHAY, DUAL-CHANNEL MOSFET Si7940DP
L1: TOKO, FDV0620-2R2M
C OUT2 : MURATA, GRM31CR60J476M
D1: VISHAY BAT54
Figure 22. Typical Application Circuit with all Multilayer Ceramic Capacitors (MLCC), 3.3 V to 5 V Input
Rev. C | Page 21 of 24
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| ADP1828ACPZ-R7 | IC REG CTRLR BUCK PWM VM 20LFCSP |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADP1821-BL1-EVZ | 制造商:Analog Devices 功能描述:Evaluation Board For Step-Down DC-To-DC Controller 制造商:Analog Devices 功能描述:BLANK ADISIMPOWER EVAL ADP1821 - Boxed Product (Development Kits) |
| ADP1821-BL2-EVZ | 制造商:Analog Devices 功能描述:Evaluation Board For Step-Down DC-To-DC Controller 制造商:Analog Devices 功能描述:BLANK ADISIMPOWER EVAL ADP1821 - Boxed Product (Development Kits) |
| ADP1821-EVAL | 功能描述:电源管理IC开发工具 Evaluation Board I.C. 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 |
| ADP1822 | 制造商:AD 制造商全称:Analog Devices 功能描述:PWM, Step-Down DC-to-DC Controller with Margining and Tracking |
| ADP1822ARQZ-R7 | 功能描述:IC REG CTRLR BUCK PWM VM 24-QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:75 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:1MHz 占空比:81% 电源电压:4.3 V ~ 13.5 V 降压:是 升压:是 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:0°C ~ 70°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:管件 产品目录页面:1051 (CN2011-ZH PDF) 其它名称:296-2543-5 |
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