- 您现在的位置：买卖IC网 > PDF目录13574 > MAX1595EUA50+T (Maxim Integrated Products)IC REG MULTI CONFIG 5V 8UMAX PDF资料下载
参数资料
| 型号： | MAX1595EUA50+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 4/7页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG 5V 8UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 降压（降压），升压（升压），切换电容（充电泵） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 5V |
| 输入电压： | 1.8 V ~ 5.5 V |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 125mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-uMAX |
Regulated 3.3V/5.0V Step-Up/
Step-Down Charge Pump
Pin Description
μMAX
1
2
3
4
5
6
7
8
PIN
TQFN-EP
12
1
2, 3
4
5, 6
7, 8
9
10, 11
NAME
AOUT
SHDN
IN
GND
PGND
CXN
CXP
OUT
FUNCTION
Analog Power and Sense Input for Error Amplifier/Comparator. Connect to OUT at
output filter capacitor.
Shutdown Input. When SHDN = low, the device turns off; when SHDN = high, the device
activates. In shutdown, OUT is disconnected from IN.
Input Supply. Can range from 1.8V to 5.5V. Bypass to GND with a 1μF capacitor.
Ground
Power Ground
Negative Terminal of the Charge-Pump Transfer Capacitor
Positive Terminal of the Charge-Pump Transfer Capacitor
Output. Bypass to GND with output capacitor filter.
Exposed Pad. Internally connected to GND. Connect to a large ground plane to
—
—
EP
maximize thermal performance. Not intended as an electrical connection point (TQFN
package only).
Detailed Description
The MAX1595 charge pump provides either a 3.3V or 5V
IN
S2
OUT
regulated output. It delivers a maximum 125mA load cur-
rent. In addition to boost regulating from a lower supply,
it is also capable of buck regulating from supplies that
exceed the regulated output by a diode drop or more.
Designed specifically for compact applications, a com-
plete regulator circuit requires only three small external
capacitors. An innovative control scheme provides con-
stant frequency operation from medium to heavy loads,
while smoothly transitioning to low-power mode at light
loads to maintain optimum efficiency. In buck mode,
switch S1 (Figure 1) is switched continuously to IN, while
C IN
S1
C X
OSC
C OUT
switch S2 alternates between IN and OUT. An amount of
charge proportional to the difference between the output
voltage and the supply voltage is stored on C X , which
gets transferred to the output when the regulation point is
reached. Maximum output ripple is proportional to the
difference between the supply voltage and the output
voltage, as well as to the ratio of the transfer capacitor
(C X ) to the output capacitor (C OUT ).
The MAX1595 consists of an error amplifier, a 1.23V
bandgap reference, internal resistive feedback network,
oscillator, high-current MOSFET switches, and shutdown
and control logic. Figure 1 shows an idealized unregulat-
ed charge-pump voltage doubler. The oscillator runs at a
50% duty cycle. During one half of the period, the trans-
fer capacitor (C X) charges to the input voltage. During
the other half, the doubler transfers the sum of C X and
input voltage to the output filter capacitor (C OUT ). Rather
Figure 1. Unregulated Voltage Doubler
than doubling the input voltage, the MAX1595 provides a
regulated output voltage of either 3.3V or 5.0V.
Shutdown
Driving SHDN low places the device in shutdown mode.
The device draws 0.1μA of supply current in this mode.
When driven high, the MAX1595 enters a soft-start
mode. Soft-start mode terminates when the output volt-
age regulates, or after 2ms, whichever comes first. In
shutdown, the output disconnects from the input.
Undervoltage Lockout
The MAX1595 has an undervoltage-lockout that deacti-
vates the devices when the input voltage falls below 1.6V.
Below UVLO, hysteresis holds the device in shutdown until
the input voltage rises 40mV above the lockout threshold.
4
_______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| UWF1E150MCL1GB | CAP ALUM 15UF 25V 20% SMD |
| AHA106M16B12T-F | CAP ALUM 10UF 16V 20% SMD |
| ASM06DTMT-S664 | CONN EDGECARD 12POS R/A .156 |
| AGM06DTMT-S664 | CONN EDGECARD 12POS R/A .156 |
| AHA105M50B12T-F | CAP ALUM 1UF 50V 20% SMD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1598EZK25+T | 功能描述:低压差稳压器 - LDO Integrated Circuits (ICs) 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 |
| MAX1598EZK25-T | 功能描述:低压差稳压器 - LDO 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 |
| MAX1598EZK28+T | 功能描述:低压差稳压器 - LDO Integrated Circuits (ICs) 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 |
| MAX1598EZK28-T | 功能描述:低压差稳压器 - LDO 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 |
| MAX1598EZK29+T | 功能描述:低压差稳压器 - LDO Integrated Circuits (ICs) 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 |
发布紧急采购，3分钟左右您将得到回复。