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MCP1640C Datasheet - Page 7

Download or read online Microchip Technology MCP1640C 0.65V Start-Up Synchronous Boost Regulator With True Output Disconnect Or Input/Output Bypass Option pdf datasheet.



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Note: Unless otherwise indicated,
V
= EN = 1.2V, C
IN
10000
PWM / PFM
PWM ONLY
1000
V
V
= 2.0V
OUT
OUT
100
V
= 3.3V
V
= 2.0V
OUT
OUT
10
0.8
1.1
1.4
1.7
2
2.3
2.6
V
(V)
IN
FIGURE 2-13:
Input No Load Current vs.
V
.
IN
5
4
P - Channel
3
2
1
N - Channel
0
1
1.5
2
2.5
3
3.5
> V
or V
IN
OUT
FIGURE 2-14:
N-Channel and P-Channel
R
vs. > of V
or V
.
DSON
IN
OUT
16
14
V
= 3.3V
V
= 2.0V
OUT
OUT
12
10
8
6
4
2
0
0
0.5
1
1.5
2
2.5
V
(V)
IN
FIGURE 2-15:
PFM / PWM Threshold
Current vs. V
.
IN
 2011 Microchip Technology Inc.
MCP1640/B/C/D
= C
= 10 µF, L = 4.7 µH, V
OUT
IN
V
= 5.0V
OUT
= 3.3V
V
= 5.0V
OUT
2.9
3.2
3.5
FIGURE 2-16:
Mode Waveforms.
4
4.5
5
FIGURE 2-17:
PWM Mode Waveforms.
V
= 5.0V
OUT
3
3.5
4
FIGURE 2-18:
Waveforms.
= 3.3V, I
= 15 mA, T
= +25°C.
OUT
LOAD
A
MCP1640 3.3V V
PFM
OUT
MCP1640B 3.3V V
OUT
MCP1640/B High Load
DS22234B-page 7

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