MCP73833/4
Stand-Alone Linear Li-Ion / Li-Polymer Charge
Management Controller
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:
- 4.2V, 4.35V, 4.4V, or 4.5V, + 0.75%
• Programmable Charge Current: 1A Maximum
• Preconditioning of Deeply Depleted Cells
- Selectable Current Ratio
- Selectable Voltage Threshold
• Automatic End-of-Charge Control
- Selectable Current Threshold
- Selectable Safety Time Period
• Automatic Recharge
Description
The MCP73833/4 is a highly advanced linear charge
management controller for use in space-limited, cost
sensitive applications. The MCP73833/4 is available in
a 10-Lead, 3mm x 3mm DFN package or a 10-Lead,
MSOP package. Along with its small physical size, the
low number of external components required makes
the MCP73833/4 ideally suited for portable applica-
tions. For applications charging from a USB port, the
MCP73833/4 can adhere to all the specifications
governing the USB power bus.
The MCP73833/4 employs a constant current/constant
voltage charge algorithm with selectable precondition-
ing and charge termination. The constant voltage
regulation is fixed with four available options: 4.20V,
4.35V, 4.40V, or 4.50V, to accomodate new, emerging
battery charging requirements. The constant current
value is set with one external resistor. The
MCP73833/4 limits the charge current based on die
temperature during high power or high ambient condi-
tions. This thermal regulation optimizes the charge
cycle time while maintaining device reliability.
Several options are available for the preconditioning
threshold, preconditioning current value, charge
termination value, and automatic recharge threshold.
The preconditioning value and charge termination
value are set as a ratio, or percentage, of the
programmed constant current value. Preconditioning
can be set
to 100%
. Refer to
Section 1.0 “Electrical
Characteristics”
for available options and the
“Product Indentification System”
for standard
options.
The MCP73833/4 is fully specified over the ambient
temperature range of -40°C to +85°C.
- Selectable Voltage Threshold
•
•
•
•
Two Charge Status Outputs
Cell Temperature Monitor
Low-Dropout Linear Regulator Mode
Automatic Power-Down when Input Power
Removed
• Under Voltage Lockout
• Numerous Selectable Options Available for a
Variety of Applications:
- Refer to
Section 1.0 “Electrical
Characteristics”
for Selectable Options
- Refer to the
”Product Identification
System”
for Standard Options
• Available Packages:
- 3mm x 3mm DFN-10
- MSOP-10
Package Types
DFN-10
V
DD
1
V
DD
2
STAT1 3
STAT2 4
V
SS
5
10 V
BAT
9 V
BAT
8 THERM
7 PG(TE)
6 PROG
10
9
8
7
6
V
BAT
V
BAT
THERM
PG(TE)
PROG
Applications
•
•
•
•
•
•
•
Lithium-Ion / Lithium-Polymer Battery Chargers
Personal Data Assistants
Cellular Telephones
Digital Cameras
MP3 Players
Bluetooth Headsets
USB Chargers
MSOP-10
V
DD
V
DD
STAT1
STAT2
V
SS
1
2
3
4
5
©
2006 Microchip Technology Inc.
DS22005A-page 1
MCP73833/4
Typical Application
1A Li-Ion Battery Charger
V
IN
1 µF
3
470Ω
4
470Ω
470Ω
STAT1 THERM
STAT2
PROG
V
SS
MCP73833
8
6
5
1 kΩ
T 10 kΩ
1,2 V
DD
V
BAT
9,10
1 µF
+ Single
- Li-Ion
Cell
7 PG
Functional Block Diagram
V
DD
10 µA
Direction
Control
V
BAT
6 µA
G=0.001
PROG
G=0.001
1 kΩ
CURRENT
LIMIT
+
-
Reference
Generator
V
REF
(1.21V)
310 kΩ
72.7 kΩ
6 µA
+
-
+
-
+
-
111 kΩ
10 kΩ
+
-
CA
PRECONDITION
470.6 kΩ
48 kΩ
TERMINATIO N
6 kΩ
CHARG E
+
-
VA
157.3 kΩ
50 µA
+
-
+
-
+
-
+
-
+
-
1 MΩ
121 kΩ
SHDN
Charge
Control,
Timer,
and
Status
Logic
175 kΩ
54 kΩ
STAT1
LDO
STAT2
V
SS
THERM
121 kΩ
UVLO
PG (TE)
HTVT
470.6kΩ
LTVT
DS22005A-page 2
©
2006 Microchip Technology Inc.
MCP73833/4
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
indicated in the operational listings of this specification
is not implied. Exposure to maximum rating conditions
for extended periods may affect device reliability.
Absolute Maximum Ratings
V
DD
........................................................................ 7.0V
All Inputs and Outputs w.r.t. V
SS
.....-0.3 to (V
DD
+0.3)V
Maximum Junction Temperature, T
J
. Internally Limited
Storage temperature .......................... -65°C to +150°C
ESD protection on all pins:
Human Body Model (HBM)
(1.5 kΩ in Series with 100 pF)...............................
≥
4 kV
Machine Model (MM)
(200 pF, No Series Resistance) ........................... 300V
DC CHARACTERISTICS
Electrical Specifications:
Unless otherwise specified, all limits apply for V
DD
= [V
REG
(Typ)+0.3V] to 6V, T
A
=-40°C to 85°C.
Typical values are at +25°C, V
DD
= [V
REG
(Typ)+1.0V]
Parameters
Supply Input
Supply Voltage
V
DD
3.75
V
REG
(Typ)
+0.3V
Supply Current
I
SS
—
—
—
—
UVLO Start Threshold
UVLO Stop Threshold
UVLO Hysteresis
Regulated Output Voltage
V
START
V
STOP
V
HYS
V
REG
3.4
3.3
—
4.168
4.318
4.367
4.467
Line Regulation
Load Regulation
Supply Ripple Attenuation
|(ΔV
BAT
/V
BAT
)
/ΔV
DD
|
|ΔV
BAT
/ V
BAT
|
PSRR
—
—
—
—
—
Current Regulation (Fast Charge Constant Current Mode)
Fast Charge Current Regulation
I
REG
90
900
Maximum Output Current Limit
I
MAX
—
100
1000
1200
110
1100
—
mA
mA
mA
PROG = 10 kΩ
PROG = 1.0 kΩ
T
A
=-5°C to +55°C
PROG < 833Ω
—
—
2000
150
100
50
3.55
3.45
100
4.20
4.35
4.40
4.50
0.10
0.10
58
47
25
6
6
3000
300
300
100
3.7
3.6
—
4.232
4.382
4.433
4.533
0.30
0.30
—
—
—
V
V
µA
µA
µA
µA
V
V
mV
V
V
V
V
%/V
%
dB
dB
dB
V
DD
=[V
REG
(Typ)+1V] to 6V
I
OUT
=10 mA
I
OUT
=10 mA to 100 mA
V
DD
=[V
REG
(Typ)+1V]
I
OUT
=10 mA, 10Hz to 1 kHz
I
OUT
=10 mA, 10Hz to 10 kHz
I
OUT
=10 mA, 10Hz to 1 MHz
V
DD
=[V
REG
(Typ)+1V]
I
OUT
=10 mA
T
A
=-5°C to +55°C
Charging
Charge Complete, Standby
Charging
Charge Complete
Standby (No Battery or PROG
Floating)
Shutdown (V
DD
< V
BAT
, or
V
DD
< V
STOP
)
V
DD
Low to High
V
DD
High to Low
Sym
Min
Typ
Max
Units
Conditions
Voltage Regulation (Constant Voltage Mode, System Test Mode)
©
2006 Microchip Technology Inc.
DS22005A-page 3
MCP73833/4
DC CHARACTERISTICS (CONTINUED)
Electrical Specifications:
Unless otherwise specified, all limits apply for V
DD
= [V
REG
(Typ)+0.3V] to 6V, T
A
=-40°C to 85°C.
Typical values are at +25°C, V
DD
= [V
REG
(Typ)+1.0V]
Parameters
Precondition Current Ratio
Sym
I
PREG
/ I
REG
Min
7.5
15
30
—
Precondition Voltage Threshold
Ratio
Precondition Hysteresis
Charge Termination
Charge Termination Current Ratio
I
TERM
/ I
REG
3.75
5.6
7.5
15
Automatic Recharge
Recharge Voltage Threshold Ratio
Pass Transistor ON-Resistance
ON-Resistance
Battery Discharge Current
Output Reverse Leakage Current
I
DISCHARGE
—
—
—
—
Status Indicators - STAT1, STAT2, PG
Sink Current
Low Output Voltage
Input Leakage Current
PROG Input
Charge Impedance Range
Standy Impedance
Thermistor Bias
Thermistor Current Source
Thermistor Comparator
Upper Trip Threshold
Upper Trip Point Hysteresis
Lower Trip Threshold
Lower Trip Point Hysteresis
System Test (LDO) Mode
Input High Voltage Level
THERM Input Sink Current
Bypass Capacitance
V
IH
I
SINK
C
BAT
(V
DD
-0.1)
Typ
10
20
40
100
66.5
71.5
100
5
7.5
10
20
94.0
96.5
300
Max
12.5
25
50
—
70
75
—
6.25
9.4
12.5
25
—
—
—
Units
%
%
%
%
%
%
mV
%
%
%
%
%
%
mΩ
Conditions
PROG = 1.0 kΩ to 10 kΩ
T
A
=-5°C to +55°C
Preconditioning Current Regulation (Trickle Charge Constant Current Mode)
V
PTH
/ V
REG
V
PHYS
64
69
—
V
BAT
Low to High
V
BAT
High to Low
PROG = 1.0 kΩ to 10 kΩ
T
A
=-5°C to +55°C
V
RTH
/ V
REG
—
—
V
BAT
High to Low
R
DSON
—
V
DD
= 3.75V
T
J
= 105°C
PROG Floating
V
DD
< V
BAT
V
DD
< V
STOP
Charge Complete
0.15
0.25
0.15
-5.5
15
0.4
0.01
—
—
2
2
2
-15
25
1
1
20
200
µA
µA
µA
µA
mA
V
µA
kΩ
kΩ
I
SINK
V
OL
I
LK
R
PROG
R
PROG
—
—
—
1
70
I
SINK
= 4 mA
High Impedance, 6V on pin
Minimum Impedance for
Standby
2 kΩ < R
THERM
< 50 kΩ
V
THERM
Low to High
V
THERM
High to Low
I
THERM
V
T1
V
T1HYS
V
T2
V
T2HYS
47
1.20
—
0.235
—
50
1.23
-50
0.25
50
—
6
—
—
53
1.26
—
0.265
—
—
20
—
—
µA
V
mV
V
mV
V
µA
µF
µF
3
1
4.7
Stand-by or system test mode
I
OUT
< 250 mA
I
OUT
> 250 mA
DS22005A-page 4
©
2006 Microchip Technology Inc.
MCP73833/4
DC CHARACTERISTICS (CONTINUED)
Electrical Specifications:
Unless otherwise specified, all limits apply for V
DD
= [V
REG
(Typ)+0.3V] to 6V, T
A
=-40°C to 85°C.
Typical values are at +25°C, V
DD
= [V
REG
(Typ)+1.0V]
Parameters
Automatic Power Down
Automatic Power Down Entry
Threshold
Automatic Power Down Exit Thresh-
old
Timer Enable Input (TE)
Input High Voltage Level
Input Low Voltage Level
Input Leakage Current
Thermal Shutdown
Die Temperature
Die Temperature Hysteresis
T
SD
T
SDHYS
—
—
150
10
—
—
°C
°C
V
IH
V
IL
I
LK
2.0
—
—
—
—
0.01
—
0.6
1
V
V
µA
V
TE
= 6V
V
PD
V
PDEXIT
—
—
V
BAT
+
50 mV
V
BAT
+
150 mV
—
—
V
V
2.3V < V
BAT
< V
REG
V
DD
Falling
2.3V < V
BAT
< V
REG
V
DD
Rising
Sym
Min
Typ
Max
Units
Conditions
AC CHARACTERISTICS
Electrical Specifications:
Unless otherwise specified, all limits apply for V
DD
= [V
REG
(Typ)+0.3V] to 6V, T
A
=-40°C to 85°C.
Typical values are at +25°C, V
DD
= [V
REG
(Typ)+1.0V]
Parameters
UVLO Start Delay
Current Regulation
Transition Time Out of Preconditioning
Current Rise Time Out of Preconditioning
Preconditioning Comparator Filter Time
Termination Comparator Filter Time
Charge Comparator Filter Time
Thermistor Comparator Filter Time
Elapsed Timer
Elapsed Timer Period
t
ELAPSED
0
3.6
5.4
7.2
Status Indicators
Status Output turn-off
Status Output turn-on
t
OFF
t
ON
—
—
—
—
200
200
µs
µs
I
SINK
= 1 mA to 0 mA
I
SINK
= 0 mA to 1 mA
0
4.0
6.0
8.0
0
4.4
6.6
8.8
Hours
Hours
Hours
Hours
Timer Disabled
t
DELAY
t
RISE
t
PRECON
t
TERM
t
CHARGE
t
THERM
—
—
0.4
0.4
0.4
0.4
—
—
1.3
1.3
1.3
1.3
1
1
3.2
3.2
3.2
3.2
ms
ms
ms
ms
ms
ms
V
BAT
<V
PTH
to V
BAT
>V
PTH
I
OUT
Rising to 90% of I
REG
Average V
BAT
Rise/Fall
Average I
OUT
Falling
Average V
BAT
Falling
Average THERM Rise/Fall
Sym
t
START
Min
—
Typ
—
Max
5
Units
ms
Conditions
V
DD
Low to High
TEMPERATURE SPECIFICATIONS
Electrical Specifications:
Unless otherwise specified, all limits apply for V
DD
= [V
REG
(Typ)+0.3V] to 6V.
Typical values are at +25°C, V
DD
= [V
REG
(Typ)+1.0V]
Parameters
Temperature Ranges
Specified Temperature Range
Operating Temperature Range
Storage Temperature Range
Thermal Package Resistances
Thermal Resistance, MSOP-10
Thermal Resistance, 3mm x 3mm DFN-10
θ
JA
θ
JA
—
—
113
41
—
—
°C/W
°C/W
4-Layer JC51-7 Standard
Board, Natural Convection
4-Layer JC51-7 Standard
Board, Natural Convection
T
A
T
A
T
A
-40
-40
-65
—
—
—
+85
+125
+150
°C
°C
°C
Symbol
Min
Typ
Max
Units
Conditions
©
2006 Microchip Technology Inc.
DS22005A-page 5
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