MCP1640-I/MC Microchip Technology, MCP1640-I/MC Datasheet - Page 14

• 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 14
FIGURE 2-2:
Reference Design Setup Circuit.
2.2.2
The board is powered from a quadruple-A battery which has 600 mAh typical capacity.
If the battery is inserted in the holder, the application will start running in Standby mode.
In this mode, PIC12F617 works in Sleep Mode most of the time, consuming a few µA
from the battery. MCP1640 consumes 0.75 µA typically in Shutdown mode. When
MCP1640 is in normal operating mode, the No Load Input Current is approximately
70 µA at 1.5V input. To reduce the average input current of the board, the MCP1640’s
EN input is pulsed at a slow rate. Figure 2-3 shows that this current is reduced up to
80%.
FIGURE 2-3:
in Standby Mode.
+
AAAA Battery
How the MCP1640 Single Quadruple-A Battery Boost Converter
Reference Design is working?
3.3V OUT
30
25
20
15
10
0.8
MCP1640 Single Quadruple-A Battery Boost Converter
The Average Current Consumed from the Battery
S1: Switch ON/OFF
_
3.3V OUT
1
Input Voltage (V)
1.2
Voltmeter
© 2010 Microchip Technology Inc.
1.4
47R/0.5W
1.6