- 您现在的位置：买卖IC网 > PDF目录20745 > MAX1659ESA (Maxim Integrated)IC REG LDO 5V/ADJ .35A 8-SOIC PDF资料下载
参数资料
| 型号： | MAX1659ESA |
| 厂商： | Maxim Integrated |
| 文件页数： | 7/12页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 5V/ADJ .35A 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 稳压器拓扑结构： | 正，固定式或可调式 |
| 输出电压： | 5V，1.25 V ~ 16 V |
| 输入电压： | 2.7 V ~ 16.5 V |
| 电压 - 压降（标准）： | 0.49V @ 350mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 350mA（最小） |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
350mA, 16.5V Input,
Low-Dropout Linear Regulators
P-Channel Pass Transistor
The MAX1658/MAX1659 feature an internal P-channel
ogy of a typical circuit operating in adjustable mode.
The output voltage is set by the following equation:
V OUT = V SET ? 1 +
R 2 ?
MOSFET pass transistor. Using a MOSFET provides
several advantages over similar PNP designs, including
lower dropout voltage and extended battery life. Unlike
bipolar transistors, MOSFETs reduce quiescent current,
?
?
R 1 ?
?
R1 = R2 ? OUT ? 1 ?
because they require no base current, particularly at
heavy loads and in dropout. As a result, the
MAX1658/MAX1659 operate at a low quiescent current
even in dropout.
Output Voltage Selection
Dual Mode operation allows the MAX1658/MAX1659 to
operate at either a preset or a user-adjustable output
voltage. The device compares the SET pin voltage with
an internal 65mV reference. If the voltage is lower than
65mV (typically achieved by grounding SET), the
device switches to an internal resistor-divider feedback
network that sets the output voltage. The MAX1658’s
preset output voltage is 3.3V and the MAX1659’s is 5V
(Figure 2).
If the SET pin is not below 65mV, the device switches to
external feedback and SET becomes a feedback input.
The feedback network can be configured to produce
an output between 16V and the voltage reference
(nominally 1.21V). Under regulation, the feedback
mechanism adjusts the error signal such that the volt-
age at the SET pin equals the reference voltage.
Therefore, to achieve the minimum output, connect SET
directly to OUT. For other voltages, a resistive voltage-
divider network is necessary. Figure 3 shows the topol-
OUTPUT VOLTAGE
where V SET = 1.21V. Solving for R1 yields:
? V ?
? V SET ?
The input leakage current of the SET input is less than
25nA. This allows the use of large resistors in the feed-
back network to minimize output current loss without
compromising accuracy. R2 can be as high as 500k ?
in most applications.
Shutdown
A logic low on the SHDN pin places the MAX1658/
MAX1659 in shutdown. This mode deactivates all func-
tions, including the pass transistor. The device con-
sumes less than 1μA of supply current in shutdown,
and its output becomes high impedance. The
MAX1658/MAX1659 exit shutdown in 100μs.
Output Current Limit
The MAX1658/MAX1659 include current-limiting circuit-
ry that monitors and controls the pass transistor and
limits output current to around 900mA. The output can
be shorted to ground indefinitely without damaging the
device.
3.3V/350mA
INPUT
OUTPUT
ON
OFF
2
SHDN
OUT
4, 5
(5V/350mA)
VOLTAGE
3, 6, 7
IN
MAX1658
MAX1659
OUT
4, 5
VOLTAGE
INPUT
VOLTAGE
3, 6, 7
IN
MAX1658
(MAX1659)
10 μ F
2
SHDN
SET
1
R1
C OUT
10 μ F
(
0.1 μ F
GND
8
SET
1
0.1 μ F
GND
8
V OUT = V SET 1 + R1
R2
V SET = 1.21V
)
R2
Figure 2. Preset Output Configuration
Figure 3. Adjustable Output Configuration Using External
Feedback Resistors
_______________________________________________________________________________________
7
相关PDF资料 |
PDF描述 |
|---|---|
| ABM40DTKI | CONN EDGECARD 80POS DIP .156 SLD |
| EB43-S4R4060W | CONN EDGEBOARD DUAL 80POS 3A |
| GBC30DCSH | CONN EDGECARD 60POS DIP .100 SLD |
| EBM08DRSN-S288 | CONN EDGECARD 16POS .156 EXTEND |
| VI-J2N-CX-F3 | CONVERTER MOD DC/DC 18.5V 75W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1659ESA+ | 功能描述:低压差稳压器 - LDO 350mA 16.5V RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX1659ESA+T | 功能描述:低压差稳压器 - LDO 350mA 16.5V RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX1659ESA-T | 功能描述:低压差稳压器 - LDO 350mA 16.5V RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX165ACPN | 功能描述:模数转换器 - ADC Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX165ACPN+ | 功能描述:模数转换器 - ADC 8-Bit 200ksps 2.46V Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
发布紧急采购，3分钟左右您将得到回复。