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

• Manufacturer Part Number: MCP1640T-I/CHY
• Description: IC CONV DCDC STEPUP SYNC SOT23-6
• Manufacturer: Microchip Technology
• Type: Step-Up (Boost)r

Specifications of MCP1640T-I/CHY

• Package / Case: SOT-23-6
• 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
• Other names: MCP1640T-I/CHYTR

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