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MCP1642BT-ADJI/MS

更新时间： 2024-09-30 00:49:15
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美国微芯 - MICROCHIP /
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32页 687K
描述
1.8A Input Current Switch, 1 MHz Low-Voltage Start-Up Synchronous Boost Regulator

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MCP1642BT-ADJI/MS 数据手册

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MCP1642B/D  
1.8A Input Current Switch, 1 MHz Low-Voltage Start-Up  
Synchronous Boost Regulator  
Features  
General Description  
• Up to 96% Typical Efficiency  
The  
MCP1642B/D  
devices  
are  
compact,  
high-efficiency, fixed-frequency, synchronous step-up  
DC-DC converters. This family of devices provides an  
easy-to-use power supply solution for applications  
powered by either one-cell, two-cell, or three-cell  
alkaline, Ultimate Lithium, NiCd, NiMH, one-cell Li-Ion  
or Li-Polymer batteries.  
• 1.8A Typical Peak Input Current Limit:  
- IOUT > 175 mA @ 1.2V VIN, 3.3V VOUT  
- IOUT > 600 mA @ 2.4V VIN, 3.3V VOUT  
- IOUT > 800 mA @ 3.3V VIN, 5.0V VOUT  
- IOUT > 1A @ VIN > 3.6V, 5.0V VOUT  
• Low Start-Up Voltage: 0.65V, typical 3.3V VOUT  
@ 1 mA  
Low-voltage technology allows the regulator to start-up  
without high inrush current or output voltage overshoot  
from  
a
low voltage input. High efficiency is  
• Low Operating Input Voltage: 0.35V, typical 3.3V  
VOUT @ 1 mA  
accomplished by integrating the low-resistance  
N-Channel Boost switch and synchronous P-Channel  
switch. All compensation and protection circuitry are  
integrated to minimize the number of external  
components. An open-drain Power Good output is  
provided to indicate when the output voltage is within  
10% of regulation and facilitates the interface with an  
MCU. For standby applications, MCP1642B provides a  
“true output disconnect” from input to output while in  
shutdown (EN = GND). An additional device option  
(MCP1642D) is available and connects “input to output  
bypass” while in shutdown. Both options consume less  
than 1 µA of input current.  
• Output Voltage Range:  
- Reference Voltage, VFB = 1.21V  
- 1.8V to 5.5V for the adjustable device option  
- 1.8V, 3.0V, 3.3V and 5.0V for fixed VOUT  
options  
• Maximum Input Voltage VOUT < 5.5V  
• PWM Operation: 1 MHz  
- Low Noise, Anti-Ringing Control  
• Power Good Open-Drain Output  
• Internal Synchronous Rectifier  
• Internal Compensation  
For the adjustable (ADJ) device options, the output  
voltage is set by a small external resistor divider. Fixed  
VOUT device options do not require external divider  
resistors. Two package options, 8-lead MSOP and 8-  
lead 2x3 DFN, are available.  
• Inrush Current Limiting and Internal Soft-Start  
• Selectable, Logic-Controlled Shutdown States:  
- True Load Disconnect Option (MCP1642B)  
- Input-to-Output Bypass Option (MCP1642D)  
• Shutdown Current (All States): 1 µA  
• Overtemperature Protection  
Package Types  
MCP1642B/D-xx  
MCP1642B/D-xx  
MSOP  
2x3 DFN*  
• Available Packages:  
- 8-Lead MSOP  
VIN  
EN  
NC  
1
8
7
6
5
EN  
VIN  
1
2
8
7
- 8-Lead 2x3 DFN  
SGND  
2
3
4
NC  
PG  
SGND  
PGND  
SW  
EP  
9
Applications  
• One, Two and Three-Cell Alkaline, Lithium  
Ultimate and NiMH/NiCd Portable Products  
PG  
PGND  
SW  
3
4
6
5
VOUT  
VOUT  
• Single-Cell Li-Ion to 5V Converters  
• PIC® MCU Power  
MCP1642B/D-ADJ  
MCP1642B/D-ADJ  
MSOP  
2x3 DFN*  
• USB Emergency Backup Charger from Batteries  
• Personal Medical Products  
• Wireless Sensors  
VIN  
EN  
VFB  
1
2
3
4
8
7
6
5
EN  
VIN  
1
8
SGND  
VFB  
SGND  
PGND  
SW  
2
3
4
7
6
5
EP  
9
PG  
PGND PG  
• Hand-Held Instruments  
VOUT  
SW  
• GPS Receivers  
VOUT  
• +3.3V to +5.0V Distributed Power Supply  
* Includes Exposed Thermal Pad (EP); see Table 3-1.  
DS20005253A-page 1  
2014 Microchip Technology Inc.  
1234567...32

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MCP1642BT-ADJI/MS 替代型号

型号 品牌 替代类型 描述 数据表
MCP1642B-ADJI/MS MICROCHIP

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