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参数资料
| 型号： | ADP2303ARDZ-5.0-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 16/28页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 5V 3A 8SOIC |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 5V |
| 输入电压： | 3 V ~ 20 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 700kHz |
| 电流 - 输出： | 3A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm Width）裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 8-SOIC-EP |
| 其它名称： | ADP2303ARDZ-5.0-R7DKR |
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?
V OUT ? 0 . 800 V ? ? ? 1 ? TOP
?
ADP2302/ADP2303
APPLICATIONS INFORMATION
ADIsimPower DESIGN TOOL
The ADP2302/ADP2303 are supported by the ADIsimPower
design tool set. ADIsimPower is a collection of tools that produce
complete power designs optimized for a specific design goal.
The tools enable the user to generate a full schematic and bill of
materials, and calculate performance in minutes. ADIsimPower
can optimize designs for cost, area, efficiency, and parts count
while taking into consideration the operating conditions and
limitations of the IC and all real external components. For
more information about ADIsimPower design tools, refer to
www.analog.com/ADIsimPower . The tool set is available from
this website, and users can request an unpopulated board
through the tool.
PROGRAMMING OUTPUT VOLTAGE
ADP2302/ADP2303 have an adjustable version where the output
voltage is programmed through an external resistive divider, as
shown in Figure 45. Suggested resistor values for the typical
output voltage setting are listed in Table 6. The output voltages
are calculated using the following equation:
? R ?
? R BOT ?
where:
V OUT is the output voltage.
R TOP is the feedback resistor from V OUT to FB.
R BOT is the feedback resistor from FB to GND.
Data Sheet
for the worst case. By considering the variation of both the switch-
ing frequency and the input voltage, the equation for the lower
limit of the output voltage is
V OUT(min) = t MIN-ON × f SW(max) × ( V IN(max) + V D ) ? V D
where:
V IN(max) is the maximum input voltage.
f SW(max ) is the maximum switching frequency for the worst case.
t MIN-ON is the minimum controllable on time.
V D is the diode forward drop.
The upper limit of the output voltage is constrained by the mini-
mum controllable off time, which can be as high as 280 ns in
ADP2302/ADP2303 for the worst case. By considering the
variation of both the switching frequency and the input voltage,
the equation for the upper limit of the output voltage is
V OUT(max) = (1 ? t MIN-OFF × f SW(max) ) × ( V IN(min) + V D ) ? V D
where:
V IN(min) is the minimum input voltage.
f SW(max) is the maximum switching frequency for the worst case.
V D is the diode forward drop.
t MIN-OFF is the minimum controllable off time.
In addition, the bootstrap circuit limits the minimum input voltage
for the desired output due to the internal dropout voltage. To
attain stable operation at light loads and ensure proper startup for
the prebiased condition, the ADP2302/ADP2303 require the
voltage difference between the input voltage and the regulated
output voltage (or between the input voltage and the prebias
voltage) to be greater than 2.1 V for the worst case. If the voltage
ADP2302/
ADP2303
FB
R TOP
V OUT
difference is smaller, the bootstrap circuit relies on some minimum
shows the typical required minimum input voltage vs. load current
for the 3.3 V output voltage.
5.3
R BOT
Figure 45. Programming the Output Voltage Using a Resistive Voltage Divider
Table 6. Suggested Values for Resistive Voltage Divider
5.1
4.9
4.7
FOR START UP
V OUT (V)
1.2
R TOP (kΩ), ±1%
10
R BOT (kΩ), ±1%
20
4.5
4.3
1.5
1.8
2.5
3.3
5.0
10
12.7
21.5
31.6
52.3
11.3
10.2
10.2
10.2
10
4.1
3.9
3.7
3.5
WHILE IN
OPERATION
VOLTAGE CONVERSION LIMITATIONS
1
10 100
OUPTUT CURRENT (mA)
1000
There are both lower and upper output voltage limitations for a
given input voltage due to the minimum on time, the minimum
off time, and the bootstrap dropout voltage.
The lower limit of the output voltage is constrained by the
Figure 46. Minimum Input Voltage vs. Load Current
Based on three conversion limitations (the minimum on time,
the minimum off time, and the bootstrap dropout voltage),
controllable minimum on time, which can be as high as 170 ns
Rev. A | Page 16 of 28
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| ADP2303ARDZ-R7 | 功能描述:IC REG BUCK ADJ 3A 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:High Efficiency Current Mode Switching Regulators CMOS LDO Regulators 特色产品:BD91x Series Step-Down Regulators 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:两者兼有 输出数:2 输出电压:3.3V，0.8 V ~ 2.5 V 输入电压:4.5 V ~ 5.5 V PWM 型:电流模式 频率 - 开关:1MHz 电流 - 输出:1.5A 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:20-VFQFN 裸露焊盘 包装:带卷 (TR) 供应商设备封装:VQFN020V4040 产品目录页面:1373 (CN2011-ZH PDF) 其它名称:BD9152MUV-E2TR |
| ADP2303-EVALZ | 功能描述:EVAL BOARD FOR ADP2303 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 |
| ADP2303-EVALZ | 制造商:Analog Devices 功能描述:ADP2303, DC TO DC REGULATOR, STEP DOWN, |
| ADP2311-1-EVALZ | 功能描述:ADP2311 - DC/DC, Step Down 2, Non-Isolated Outputs Evaluation Board 制造商:analog devices inc. 系列:- 零件状态:有效 主要用途:DC/DC，步降 输出和类型:2，非隔离 功率 - 输出:- 电压 - 输出:1.2V，3.3V 电流 - 输出:1A，1A 电压 - 输入:4.5 V ~ 18 V 稳压器拓扑:降压 频率 - 开关:300kHz 板类型:完全填充 所含物品:板 使用的 IC/零件:ADP2311 标准包装:1 |
| ADP2311ACPZ-1-R7 | 功能描述:Buck Switching Regulator IC Positive Adjustable 0.6V 2 Output 1A 24-WFQFN Exposed Pad, CSP 制造商:analog devices inc. 系列:- 包装:剪切带（CT） 零件状态:有效 功能:降压 输出配置:正 拓扑:降压 输出类型:可调式 输出数:2 电压 - 输入（最小值）:4.5V 电压 - 输入（最大值）:18V 电压 - 输出（最小值/固定）:0.6V 电压 - 输出（最大值）:18V 电流 - 输出:1A 频率 - 开关:300kHz 同步整流器:是 工作温度:-40°C ~ 125°C （TJ） 安装类型:表面贴装 封装/外壳:24-WFQFN 裸露焊盘，CSP 供应商器件封装:24-LFCSP-WQ（4x4） 标准包装:1 |
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