MCP1640T-I/MC Microchip Technology, MCP1640T-I/MC Datasheet - Page 24

• Manufacturer Part Number: MCP1640T-I/MC
• Description: 500 KHz, 300 MA Syn. Boost, Output Disconnect & PWM/PFM Enabled 8 DFN 2x3mm T/R
• Manufacturer: Microchip Technology
• Type: Step-Up (Boost)r

Specifications of MCP1640T-I/MC

• 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
• Package / Case: 8-DFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

FIGURE C-1:
© 2010 Microchip Technology Inc.
MCP1640 Single Quadruple-A Battery Boost Converter Reference Design
Measure V_BATT
MCP1640 = OFF
V_BATT<0.8V?
ADC Setup
Q2 = OFF
Blink
Yes
Firmware Flowchart.
No
Initialize: Processor, Parameters
Yes
(BATT_Low = 0.8V), WDT,
No
Comparator, A/D
LED State?
Timer>0 ?
SLEEP ()
LED=ON
START
WDT?
&
A
No
No
Yes
No
No
Comparator Enabled
Decrement Timer
MCP1640 = OFF
MCP1640 = ON
VOUT<2.3V?
LED flashes
Delay 2 ms
Yes
Blink?
(10s)
DS51922A-page 24
B