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参数资料
型号： ADP1870ARMZ-1.0-R7
厂商： Analog Devices Inc
文件页数： 2/44页
文件大小： 0K
描述： IC REG CTRLR BUCK PWM CM 10-MSOP
标准包装： 1
PWM 型： 电流模式
输出数： 1
频率 - 最大： 1MHz
占空比： 45%
电源电压： 2.95 V ~ 20 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 ~ 125°C
封装/外壳： 10-TFSOP，10-MSOP（0.118"，3.00mm 宽）
包装： 标准包装
其它名称： ADP1870ARMZ-1.0-R7DKR

ADP1870/ADP1871
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Typical Applications Circuit............................................................ 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings ............................................................ 5
Thermal Resistance ...................................................................... 5
Boundary Condition .................................................................... 5
ESD Caution .................................................................................. 5
Pin Configuration and Function Descriptions ............................. 6
Typical Performance Characteristics ............................................. 7
ADP1870/ADP1871 Block Diagram ............................................ 18
Theory of Operation ...................................................................... 19
Startup .......................................................................................... 19
Soft Start ...................................................................................... 19
Precision Enable Circuitry ........................................................ 19
Undervoltage Lockout ............................................................... 19
On-Board Low Dropout Regulator .......................................... 19
Thermal Shutdown ..................................................................... 20
Programming Resistor (RES) Detect Circuit.......................... 20
Valley Current-Limit Setting .................................................... 20
Hiccup Mode During Short Circuit ......................................... 21
Synchronous Rectifier ................................................................ 22
REVISION HISTORY
7/12—Rev. A to Rev. B
Changed R ON = 15 mΩ/100 k? Valley Current Level Value from
7.5 to 3.87; Table 7 .......................................................................... 21
Updated Outline Dimensions ................................................................. 41
6/10—Rev. 0 to Rev. A
Added LFCSP Package ....................................................... Universal
Changes to Applications Section .................................................... 1
Changes to Internal Regulator Characteristics Parameter,
Table 1 ............................................................................................ 3
Data Sheet
Power Saving Mode (PSM) Version (ADP1871).................... 22
Timer Operation ........................................................................ 22
Pseudo-Fixed Frequency ........................................................... 23
Applications Information .............................................................. 24
Feedback Resistor Divider ........................................................ 24
Inductor Selection ...................................................................... 24
Output Ripple Voltage (ΔV RR ) .................................................. 24
Output Capacitor Selection....................................................... 24
Compensation Network ............................................................ 25
Efficiency Considerations ......................................................... 26
Input Capacitor Selection .......................................................... 27
Thermal Considerations............................................................ 28
Design Example .......................................................................... 29
External Component Recommendations .................................... 31
Layout Considerations ................................................................... 33
IC Section (Left Side of Evaluation Board) ............................. 37
Power Section ............................................................................. 37
Differential Sensing .................................................................... 38
Typical Applications Circuits ........................................................ 39
15 A, 300 kHz High Current Application Circuit .................. 39
5.5 V Input, 600 kHz Application Circuit ............................... 39
300 kHz High Current Application Circuit ............................ 40
Outline Dimensions ....................................................................... 41
Ordering Guide .......................................................................... 42
Changes to Table 2 and Table 3........................................................5
Changes to Figure 3 and Table 4......................................................6
Change to Figure 22 ....................................................................... 10
Changes to Figure 65...................................................................... 18
Changes to Efficiency Considerations Section ........................... 26
Changes to Table 9 ..................................................................................... 28
Added Figure 84; Renumbered Sequentially....................................... 28
Added Figure 96 ......................................................................................... 41
Changes to Ordering Guide .................................................................... 42
3/10—Revision 0: Initial Version
Rev. B | Page 2 of 44
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相关代理商/技术参数
参数描述
ADP1870-BL1-EVZ 功能描述:EVAL BOARD FOR ADP1870 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 标准包装:1 系列:- 主要目的:DC/DC，步降 输出及类型:1，非隔离 功率 - 输出:- 输出电压:3.3V 电流 - 输出:3A 输入电压:4.5 V ~ 28 V 稳压器拓扑结构:降压 频率 - 开关:250kHz 板类型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名称:497-12113STEVAL-ISA094V1-ND
ADP1870-BL2-EVZ 功能描述:EVAL BOARD FOR ADP1870 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 标准包装:1 系列:- 主要目的:DC/DC，步降 输出及类型:1，非隔离 功率 - 输出:- 输出电压:3.3V 电流 - 输出:3A 输入电压:4.5 V ~ 28 V 稳压器拓扑结构:降压 频率 - 开关:250kHz 板类型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名称:497-12113STEVAL-ISA094V1-ND
ADP1871 制造商:AD 制造商全称:Analog Devices 功能描述:Synchronous Buck Controller with Constant On-Time and Valley Current Mode
ADP1871-0.3-EVALZ 功能描述:BOARD EVAL FOR ADP1871-0.3 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:* 标准包装:1 系列:- 主要目的:DC/DC，步降 输出及类型:1，非隔离 功率 - 输出:- 输出电压:3.3V 电流 - 输出:3A 输入电压:4.5 V ~ 28 V 稳压器拓扑结构:降压 频率 - 开关:250kHz 板类型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名称:497-12113STEVAL-ISA094V1-ND
ADP1871-0.6-EVALZ 功能描述:BOARD EVAL FOR ADP1871-0.6 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
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