MICROCHIP MCP73811, MCP73812 Technical data
MCP73811/2
V
DD
V
BAT
5
5-Pin SOT-23
1
3
4
2
CE
PROG
V
SS
Simple, Miniature Single-Cell, Fully Integrated
Li-Ion / Li-Polymer Charge Management Controllers
Features
• Complete Linear Charge Management Controller
- Integrated Pass Transistor
- Integrated Current Sense
- Integrated Reverse Discharge Protection
• Constant Current / Constant Voltage Operation
with Thermal Regulation
• High Accuracy Preset Voltage Regulation: +
• Voltage Regulation: 4.20V
• Selectable Charge Current:
- MCP73811: 85 mA / 450 mA
• Programmable Charge Current:
- MCP73812: 50 mA - 500 mA
• Minimum External Components Required:
- MCP73811: 2 Ceramic Capacitors
- MCP73812: 2 Ceramic Capacitors and
1 Resistor
• No Preconditioning
• External End-of-Charge Control
• Automatic Power-Down when Input Power
Removed
• Active High Charge Enable
• Temperature Range:
- -40°C to +85°C
• Packaging:
- 5-Lead SOT-23
1%
Applications
Description
The MCP73811/2 devices are linear charge management controllers that are designed for use in space
limited and cost sensitive applications. The
MCP73811/2 provide specific charge algorithms for
single cell Li-Ion or Li-Polymer battery to achieve
optimal capacity in the shortest charging time possible.
Along with its small physical size, the low number of
external components required make the MCP73811/2
ideally suited for portable applications. For applications
charging from a USB port, the MCP73811 adheres to
all the specifications governing the USB power bus.
The MCP73811/2 employ a constant current/constant
voltage charge algorithm. The constant voltage regulation is fixed at 4.20V, with a tight regulation tolerance of
1%. For the MCP73811, the constant current value is
selected as 85 mA (low power USB port) or 450 mA
(high power USB port) with a digital input signal on the
PROG input. For the MCP73812, the constant current
value is set with one external resistor. The
MCP73811/2 limit the charge current based on die
temperature during high power or high ambient
conditions. This thermal regulation optimizes the
charge cycle time while maintaining device reliability.
The MCP73811/2 are fully specified over the ambient
temperature range of -40°C to +85°C. The
MCP73811/2 are available in a 5-Lead, SOT-23
package.
Package Types
• Low-Cost Lithium-Ion/Lithium-Polymer Battery
Chargers
• Rechargeable Toys
• Electronic Cigarettes
• Bluetooth Headsets
• USB Chargers
© 2007 Microchip Technology Inc. DS22036B-page 1
MCP73811/2
CE
V
DD
V
SS
PROG
V
BAT
+
-
Single
Li-Ion
Cell
4
MCP73812
5
3
1
500 mA Li-Ion Battery Charger
2
2kΩ
CE
V
DD
V
SS
PROG
V
BAT
+
-
Single
Li-Ion
Cell
4
MCP73811
5
3
1
1µF
450 mA Li-Ion Battery Charger
2
V
IN
1µF
1µF
V
IN
1µF
+
-
Reference
Generator
V
REF
(1.21V)
V
BAT
V
DD
V
BAT
G=0.001
V
SS
Direction
Control
+
-
Direction
Control
6µA
+
-
CA
157.3 kΩ
388.7 kΩ
+
-
VA
CE
Charge
Enable
2.7 kΩ
PROG
111 kΩ
528.6 kΩ
MCP73811MCP73812
12 kΩ
Typical Applications
Functional Block Diagram
DS22036B-page 2 © 2007 Microchip Technology Inc.
MCP73811/2
1.0 ELECTRICAL
CHARACTERISTICS
† Notice: Stresses above those listed under “Maximum
Ratings” may cause permanent damage to the device.
This is a stress rating only and functional operation of
the device at those or any other conditions above those
Absolute Maximum Ratings†
V
................................................................................7.0V
DDN
All Inputs and Outputs w.r.t. V
Maximum Junction Temperature, T
Storage temperature .....................................-65°C to +150°C
ESD protection on all pins
Human Body Model (1.5 kW in Series with 100 pF) ......≥ 4kV
Machine Model (200pF, No Series Resistance)..............400V
............... -0.3 to (VDD+0.3)V
SS
............ Internally Limited
J
indicated in the operational listings of this specification
is not implied. Exposure to maximum rating conditions
for extended periods may affect device reliability.
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, all limits apply for VDD= [V
T
= -40°C to +85°C. Typical values are at +25°C, V
A
DD
= [V
(typ.) + 1.0V]
REG
Parameters Sym Min Typ Max Units Conditions
Supply Input
Supply Voltage V
Supply Current I
DD
SS
3.75 — 6 V
— 1000 1500 µA Charging
— 50 100 µA Standby (CE = V
— 1.2 5 µA Shutdown
Voltage Regulation (Constant Voltage Mode)
Regulated Output Voltage V
Output Voltage Tolerance V
Line Regulation |(ΔV
Load Regulation |ΔV
REG
RTOL
BAT/VBAT
/ΔV
|
DD
BAT/VBAT
| — 0.09 0.30 % I
—4.20—VV
-1 — +1 % TA=-5°C to +55°C
)
— 0.09 0.30 %/V V
Supply Ripple Attenuation PSRR — 52 — dB I
—47—dBI
—22—dBI
Current Regulation (Fast Charge Constant-Current Mode)
Fast Charge Current I
REG
— 85 — mA MCP73811 - PROG = Low
Regulation — 450 — mA MCP73811 - PROG = High
— 50 — mA MCP73812 - PROG = 20 kΩ
— 100 — mA MCP73812 - PROG = 10 kΩ
— 500 — mA MCP73812 - PROG = 2 kΩ
Charge Current Tolerance I
RTOL
-10 — +10 % TA=-5°C to +55°C
Pass Transistor ON-Resistance
ON-Resistance R
DSON
— 400 — mΩ VDD = 3.75V, TJ = 105°C
Battery Discharge Current
Output Reverse Leakage I
DISCHARGE
Current — 0.5 2 µA Shutdown
(typ.) + 0.3V] to 6V,
REG
SS
< V
(V
I
OUT
I
OUT
OUT
V
OUT
OUT
OUT
(V
DD
DD
DD
DD
DD
- 100 mV)
BAT
=[V
(Typ)+1V]
REG
=10 mA
=[V
(Typ)+1V] to 6V
REG
=10 mA
=10 mA to 50 mA
=[V
(Typ)+1V]
REG
=10 mA, 10 Hz to 1 kHz
=10 mA, 10 Hz to 10 kHz
=10 mA, 10 Hz to 1 MHz
< V
- 100 mV)
BAT
)
© 2007 Microchip Technology Inc. DS22036B-page 3
MCP73811/2
DC CHARACTERISTICS (Continued)
Electrical Specifications: Unless otherwise indicated, all limits apply for VDD= [V
T
= -40°C to +85°C. Typical values are at +25°C, V
A
Parameters Sym Min Typ Max Units Conditions
Charge Enable (CE), PROG Input - MCP73811
Input High Voltage Level V
Input Low Voltage Level V
Input Leakage Current I
IH
IL
LK
PROG Input - MCP73812
Charge Impedance Range R
PROG
Automatic Power Down (Direction Control)
Automatic Power Down
Entry Threshold
Automatic Power Down
V
V
PDEXIT
PD
Exit Threshold
Thermal Shutdown
Die Temperature T
Die Temperature T
SD
SDHYS
Hysteresis
= [V
DD
(typ.) + 1.0V]
REG
2——V
——0.8V
—0.01 1µAV
2—20kΩ MCP73812
V
+
BAT
10 mV
—V
V
BAT
50 mV
BAT
+
+
150 mV
— 150 — °C
—10—°C
(typ.) + 0.3V] to 6V,
REG
— V 2.3V < V
VDD Falling
V
+
BAT
250 mV
V2.3V < V
VDD Rising
= VDD, V
CE
BAT
BAT
PROG
< V
< V
REG
REG
= V
DD
TEMPERATURE SPECIFICATIONS
Electrical Specifications: Unless otherwise indicated, all limits apply for V
Typical values are at +25°C, V
Parameters Sym Min Typ Max Units Conditions
Temperature Ranges
Specified Temperature Range T
Operating Temperature Range T
Storage Temperature Range T
Thermal Package Resistances
Thermal Resistance, 5-Lead, SOT-23 θ
DD
= [V
(typ.) + 1.0V]
REG
A
J
A
JA
-40 — +85 °C
-40 — +125 °C
-65 — +150 °C
— 230 — °C/W 4-Layer JC51-7 Standard Board,
DD
= [V
(typ.) + 0.3V] to 6V.
REG
Natural Convection
DS22036B-page 4 © 2007 Microchip Technology Inc.
MCP73811/2
4.170
4.175
4.180
4.185
4.190
4.195
4.200
4.205
4.210
4.50 4.75 5.00 5.25 5.50 5.75 6.00
Supply Voltage (V)
Battery Regulation Voltage
(V)
I
OUT
= 10 mA
I
OUT
= 100 mA
I
OUT
= 450 mA
4.170
4.175
4.180
4.185
4.190
4.195
4.200
4.205
4.210
-40
-30
-20
-10
0
10203040506070
80
Ambient Temperature (°C)
Battery Regulation Voltage (V)
I
OUT
= 10 mA
I
OUT
= 100 mA
I
OUT
= 450 mA
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
3.00 3.20 3.40 3.60 3.80 4.00 4.20
Battery Regulation Voltage (V)
Output Leakage Current (µA)
+85°C
-40°C
+25°C
80
81
82
83
84
85
86
87
88
89
90
4.5 4.75 5 5.25 5.5 5.75 6
Supply Voltage (V)
Charge Current (mA)
PROG = Low
Temp = +25°C
425
430
435
440
445
450
455
460
4.5 4.75 5 5.25 5.5 5.75 6
Supply Voltage (V)
Charge Current (mA)
Temp = 25°C
65
70
75
80
85
90
95
100
-40-30-20-10 0 1020304050607080
Ambient Temperature (°C)
Charge Current (mA)
V
DD
V
2.0 TYPICAL PERFORMANCE CURVES
Note: The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Note: Unless otherwise indicated, VDD = [V
(typ.) + 1V], I
REG
= 10 mA and TA= +25°C, Constant-voltage mode.
OUT
FIGURE 2-1: Battery Regulation Voltage
(V
) vs. Supply Voltage (VDD).
BAT
FIGURE 2-2: Battery Regulation Voltage
) vs. Ambient Temperature (TA).
(V
BAT
FIGURE 2-4: Charge Current (I
Supply Voltage (V
) - MCP73811.
DD
PROG = High
FIGURE 2-5: Charge Current (I
Supply Voltage (V
) - MCP73811.
DD
PROG = Low
OUT
OUT
) vs.
) vs.
= 5
FIGURE 2-3: Output Leakage Current
(I
DISCHARGE
(V
).
BAT
) vs. Battery Regulation Voltage
© 2007 Microchip Technology Inc. DS22036B-page 5
FIGURE 2-6: Charge Current (I
Ambient Temperature (T
) - MCP73811.
A
OUT
) vs.
MCP73811/2
400
410
420
430
440
450
460
470
480
-40-30-20-10 0 1020304050607080
Ambient Temperature (°C)
Charge Current (mA)
VDD = 5V
0
50
100
150
200
250
300
350
400
450
500
550
2 4 6 8 10 12 14 16 18 20
Programming Resistor (kΩ)
Charge Current (mA)
96
97
98
99
100
101
102
103
104
4.50 4.75 5.00 5.25 5.50 5.75 6.00
Supply Voltage (V)
Charge Current (mA)
R
PROG
= 10 kΩ
500
502
504
506
508
510
512
514
516
4.50 4.75 5.00 5.25 5.50 5.75 6.00
Supply Voltage (V)
Charge Current (mA)
R
PROG
= 2 kΩ
96
97
98
99
100
101
102
103
104
-40
-30
-20
-10
0
10203040506070
80
Ambient Temperature (°C)
Charge Current (mA)
R
PROG
= 10 kΩ
500
502
504
506
508
510
512
514
516
-40
-30
-20
-10
0
10203040506070
80
Ambient Temperature (°C)
Charge Current (mA)
R
PROG
= 2 kΩ
Typical Performance Curves (Continued)
Note: Unless otherwise indicated, VDD = [V
PROG = High
FIGURE 2-7: Charge Current (I
Ambient Temperature (T
) - MCP73811.
A
(typ.) + 1V], I
REG
) vs.
OUT
= 10 mA and TA= +25°C, Constant-voltage mode.
OUT
FIGURE 2-10: Charge Current (I
Supply Voltage (V
) - MCP73812.
DD
OUT
) vs.
FIGURE 2-8: Charge Current (I
Programming Resistor (R
FIGURE 2-9: Charge Current (I
Supply Voltage (V
DS22036B-page 6 © 2007 Microchip Technology Inc.
DD
) - MCP73812.
PROG
) - MCP73812.
OUT
OUT
) vs.
) vs.
FIGURE 2-11: Charge Current (I
Ambient Temperature (T
) - MCP73812.
A
FIGURE 2-12: Charge Current (I
Ambient Temperature (T
) - MCP73812.
A
OUT
OUT
) vs.
) vs.
Typical Performance Curves (Continued)
0
15
30
45
60
75
90
105
120
25354555657585
95
105
115
125
135
145
155
Junction Temperature (°C)
Charge Current (mA)
R
PROG
0
75
150
225
300
375
450
525
25354555657585
95
105
115
125
135
145
155
Junction Temperature (°C)
Charge Current (mA)
R
PROG
= 2 kΩ
-60
-50
-40
-30
-20
-10
0
0.01 0.1 1 10 100 1000
Frequency (kHz)
Attenuation (dB)
VAC = 100 mVp-p
I
OUT
= 10 mA
C
OUT
= 4.7 μF, X7R
Ceramic
-60
-50
-40
-30
-20
-10
0
0.01 0.1 1 10 100 1000
Frequency (kHz)
Attenuation (dB)
VAC = 100 mVp-p
I
OUT
= 100 mA
C
OUT
= 4.7 µF, X7R
Ceramic
-2
0
2
4
6
8
10
12
14
0
204060
80
100
120
140
160
180
200
Time (µs)
Source Voltage (V)
-0.30
-0.25
-0.20
-0.15
-0.10
-0.05
0.00
0.05
0.10
Output Ripple (V)
I
OUT
= 10 mA
C
OUT
= 4.7 µF, X7R
Ceramic
-2
0
2
4
6
8
10
12
14
0
204060
80
100
120
140
160
180
200
Time (µs)
Source Voltage (V)
-0.30
-0.25
-0.20
-0.15
-0.10
-0.05
0.00
0.05
0.10
Output Ripple (V)
I
OUT
= 100 mA
C
OUT
= 4.7 µF, X7R
Ceramic
MCP73811/2
Note: Unless otherwise indicated, VDD = [V
FIGURE 2-13: Charge Current (I
Junction Temperature (T
) - MCP73812.
J
(typ.) + 1V], I
REG
= 10 kΩ
) vs.
OUT
= 10 mA and TA= +25°C, Constant-voltage mode.
OUT
FIGURE 2-16: Power Supply Ripple
Rejection (PSRR).
FIGURE 2-14: Charge Current (I
Junction Temperature (T
FIGURE 2-15: Power Supply Ripple
Rejection (PSRR).
© 2007 Microchip Technology Inc. DS22036B-page 7
) - MCP73812.
J
OUT
) vs.
FIGURE 2-17: Line Transient Response.
FIGURE 2-18: Line Transient Response.
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