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MCP1650S-E/MS

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30
MCP1650/51/52/53
DS21876B-page 10 2004-2013 Microchip Technology Inc.
Note: Unless otherwise indicated, V
IN
= 3.3V, VOUT = 12V, C
IN
= 10 µF (x5R or X7R Ceramic), C
OUT
= 10 µF (X5R or X7R),
I
OUT
= 10 mA, L = 3.3 µH, SHDN > V
IH
, T
A
= +25°C.
FIGURE 2-19: Output Voltage vs. Output
Current (Load Regulation).
FIGURE 2-20: Output Voltage Ripple vs.
Input Voltage.
FIGURE 2-21: LBI Threshold Voltage vs.
Input Voltage.
FIGURE 2-22: LBI Hysteresis Voltage vs.
Input Voltage.
FIGURE 2-23: LBO Output Voltage vs.
LBO
Sink Current.
FIGURE 2-24: L
BO Output Timing.
12.10
12.11
12.12
12.13
12.14
12.15
12.16
12.17
10 20 30 40 50 60 70 80 90 100
Output Current (mA)
Output Voltage (V)
V
IN
= 3.3V
T
A
= +25°C
V
IN
= 4.3V
0.10
0.12
0.14
0.16
0.18
0.20
0.22
0.24
0.26
2.7 3.0 3.3 3.6 3.9 4.2 4.5 4.8 5.1 5.4 5.7 6.0
Input Voltage (V)
V
OUT
Ripple
PK-PK
(V)
I
OUT
= 100mA
T
A
= +25°C
1.205
1.210
1.215
1.220
1.225
1.230
2 2.5 3 3.5 4 4.5 5 5.5 6
Input Voltage (V)
LBI Threshold Voltage (V)
T
J
= - 40°C
T
J
= +25°C
T
J
= +125°C
120
121
122
123
124
125
126
127
128
129
22.533.544.555.56
Input Votlage (V)
LBI Hysteresis Voltage (mV)
T
J
= - 40°C
T
J
= +25°C
T
J
= +125°C
0
50
100
150
200
250
0246810
LBO Sink Current (mA)
LBO Output Voltage (mV)
T
J
= - 40°C
T
J
= +25°C
T
J
= +125°C
2004-2013 Microchip Technology Inc. DS21876B-page 11
MCP1650/51/52/53
Note: Unless otherwise indicated, V
IN
= 3.3V, VOUT = 12V, C
IN
= 10 µF (x5R or X7R Ceramic), C
OUT
= 10 µF (X5R or X7R),
I
OUT
= 10 mA, L = 3.3 µH, SHDN > V
IH
, T
A
= +25°C.
FIGURE 2-25: PG Threshold and
Hysteresis Percentage vs. Input Voltage.
FIGURE 2-26: PG Output Voltage vs. Sink
Current.
FIGURE 2-27: PG Timing.
FIGURE 2-28: Current Sense Threshold
vs. Input Voltage.
FIGURE 2-29: V
EXT
High Output Voltage
vs. Input Voltage.
FIGURE 2-30: V
EXT
Low Output Voltage
vs. Input Voltage.
-20
-15
-10
-5
0
5
10
15
20
2.7 3 3.3 3.6 3.9 4.2 4.5 4.8 5.1 5.4 5.7 6
Input Voltage (V)
PG Threshold and Hysteresis
(% of V
OUT
)
PG
TH(HIGH)
T
A
= 25°C
PG
TH(LOW)
PG
TH(Hysteresis)
0
50
100
150
200
250
0246810
PG Output Sink Current (mA)
PG Ouput Voltage (mV)
T
J
= - 40°C
T
J
= +25°C
T
J
= +125°C
104
106
108
110
112
114
116
22.533.544.555.56
Input Voltage (V)
Current Sense Threshold (mV)
T
J
= - 40°C
T
J
= +25°C
T
J
= +125°C
0.0
4.0
8.0
12.0
16.0
20.0
22.533.544.555.56
Input Voltage (V)
V
EXT
R
ON
HIGH (Ohms)
T
J
= - 40°C
T
J
= +25°C
T
J
= +125°C
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
22.533.544.555.56
Input Voltage (V)
V
EXT
R
ON
Low (Ohms)
T
J
= - 40°C
T
J
= +25°C
T
J
= +125°C
MCP1650/51/52/53
DS21876B-page 12 2004-2013 Microchip Technology Inc.
3.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1: PIN FUNCTION TABLE
3.1 External Gate Drive (EXT)
EXT is the output pin that drives the external N-channel
MOSFET on and off during boost operation. EXT is
equal to GND for SHDN or UVLO conditions.
3.2 Circuit Ground (GND)
Connect the GND pin to circuit ground. See layout
guidelines for suggested grounding physical layout.
3.3 Current Sense (CS)
Input peak current is sensed on CS through the exter-
nal current sense resistor. When the sensed current is
converted to a voltage, the current sense threshold is
122 mV below V
IN
typical. If that threshold is exceeded,
the pulse is terminated asynchronously.
3.4 Feedback Input (FB)
Connect output voltage of boost converter through
external resistor divider to the FB pin for voltage
regulation. The nominal voltage that is compared to this
input for pulse termination is 1.22V.
3.5 Shutdown Input (SHDN)
The SHDN input is used to turn the boost converter on
and off. For normal operation, tie this pin high or to V
IN
.
To turn off the device, tie this pin to low or ground.
3.6 Low Battery Input (LBI)
LBI is the input pin for the low battery comparator.
When the voltage on this pin falls below the nominal
1.22V threshold setting, the LBO (Low Battery Output)
open-drain is active-low.
3.7 Low Battery Output (LBO)
LBO is an active-low, open-drain output capable of
sinking 10 mA when the LBI pin is below the threshold
voltage. LBO is high-impedance during SHDN or UVLO
conditions.
3.8 Power Good (PG)
PG is an active-high, open-drain output capable of
sinking 10 mA when the FB input pin is 15% below its
typical value or more than 15% above its typical value,
indicating that the output voltage is out of regulation.
PG is high impedance during SHDN
or UVLO
condition.
3.9 Input Voltage (V
IN
)
V
IN
is an input supply pin. Tie 2.7V to 5.5V input power
source.
Pin No.
MCP1650
Pin No.
MCP1651
Pin No.
MCP1652
Pin No.
MCP1653
Symbol Function
1 1 1 1 EXT External Gate Drive
2 2 2 2 GND Ground
3 3 3 3 CS Current Sense
4 4 4 4 FB Feedback Input
5556SHDN
Shutdown
— 6 — 7 LBI Low Battery Input
—7—8LBO
Low Battery Output
— — 7 9 PG Power Good Output
88810V
IN
Input Voltage
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30

MCP1650S-E/MS

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Buy MCP1650S-E/MS
Manufacturer:
Microchip Technology
Description:
Switching Controllers UVLO 2.55V
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