MCP1640-I/MC Microchip Technology, MCP1640-I/MC Datasheet - Page 12

• Manufacturer Part Number: MCP1640-I/MC
• Description: IC CONV DC-DC STEPUP SYNC 8DFN
• Manufacturer: Microchip Technology
• Type: Step-Up (Boost)r

Specifications of MCP1640-I/MC

• Package / Case: 8-DFN
• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 2 ~ 5.5 V
• Current - Output: 100mA
• Frequency - Switching: 500kHz
• Voltage - Input: 0.8 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Mounting Style: SMD/SMT
• Duty Cycle (max): 90 %
• Efficiency: 96 %
• Input / Supply Voltage (max): 0.8 V
• Input / Supply Voltage (min): 0.65 V
• Load Regulation: 0.01 %
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Output Current: 350 mA
• Output Voltage: 5 V
• Switching Frequency: 500 KHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

MCP1640 Single Quadruple-A Battery Boost Converter Reference Design
DS51922A-page 12
2.1.2
The MCP1640 Single Quadruple-A Battery Boost Converter Reference Design is
developed to demonstrate how the MCP1640 device with True Output Disconnect
Shutdown option is working attached to a microcontroller application. The board
demonstrates how to optimize battery life using MCP1640 and an 8-bit low cost PIC
microcontroller, to reduce the No Load Input Current for applications that operate in
Standby mode for a longer period of time.
FIGURE 2-1:
Reference Design Block Diagram.
The MCP1640 Single Quadruple-A Battery Boost Converter Reference Design has the
following features:
• Input voltage: one AAAA Alkaline battery
• Output voltage: 3.3V
• Output current: < 130 mA
• Up to 75% efficiency
• Standby battery current: 14.5 µA @ 1.5V input
• Start-up voltage: 0.65V at V
• Automatic PFM/PWM operation
• PWM Switching Frequency = 500 kHz
• ON/OFF switch button, with approximately 25 seconds ON
• LED status indication (Output ON and Low Battery)
• Energizer
load
Single Quadruple-A Battery Input
1
ON/OFF
S1
MCP1640 Single Quadruple-A Battery Boost Converter
Reference Design Features
®
2
Battery Holder with reverse battery protection
I/O
PIC12F617
MCP1640 Single Quadruple-A Battery Boost Converter
A/D
V
I/O
I/O
I/O
DD
IN
Status
= 1.2V, V
OUT
LED
MCP1640
= 3.3V and I
EN
V
IN
V
OUT
OUT
© 2010 Microchip Technology Inc.
Load Switch
P-MOS
= 1 mA, resistive
Load