MICROCHIP MCP73833, MCP73834 Technical data

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

- 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

Applications

• Lithium-Ion / Lithium-Polymer Battery Chargers

• Personal Data Assistants

• Cellular Telephones

• Digital Cameras

• MP3 Players

• Bluetooth Headsets

• USB Chargers

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 applications. 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 preconditioning 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 conditions. 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.

Package Types

DFN-10

MSOP-10

V

STAT1

STAT2

V

STAT1

STAT2

DD

SS

V

1

DD

V

2

DD

3

4

56

V

SS

110

2

3

4

5

10

9

8

7

9

8

7

6

V

THERM

PG(TE)

PROG

BAT

V

BAT

V

BAT

THERM

PG

(TE)

PROG

MCP73833/4

Typical Application

V

IN

1µF

Functional Block Diagram

V

DD

10 µA

Direction

Control

1A Li-Ion Battery Charger

1,2

V

DD

38

470Ω

4

470Ω

7

STAT1

STAT2

PG

THERM

PROG

470Ω

MCP73833

9,10

V

BAT

6

5

V

SS

1µF

1kΩ

Single

+

Li-Ion

Cell

T

10 kΩ

V

BAT

PROG

V

SS

THERM

175 kΩ

54 kΩ

121 kΩ

1MΩ

6µA

Reference Generator

(1.21V)

V

REF

6µA

50 µA

121 kΩ

G=0.001

+

-

+

-

+

-

+

-

+

-

1kΩ

310 kΩ

72.7 kΩ

6kΩ

157.3 kΩ

SHDN

LDO

UVLO

HTVT470.6kΩ

LTV T

111 kΩ

+

PRECONDITION

+

TERMINATIO N

+

-

CHARG E

Charge Control, Timer, and Status Logic

10 kΩ

470.6 kΩ

48 kΩ

CURRENT LIMIT

+

-

CA

+

-

VA

+

-

STAT1

STAT2

PG (TE)

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

Absolute Maximum Ratings

VDD........................................................................7.0V

All Inputs and Outputs w.r.t. V

Maximum Junction Temperature, T

.....-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.

Storage temperature .......................... -65°C to +150°C

ESD protection on all pins:

Human Body Model (HBM)

(1.5 kΩ in Series with 100 pF)............................... ≥ 4kV

Machine Model (MM)

(200 pF, No Series Resistance) ...........................300V

DC CHARACTERISTICS

Electrical Specifications: Unless otherwise specified, all limits apply for VDD= [V

Typical values are at +25°C, V

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 Charging

V

REG

(Typ)

+0.3V

— 6 V Charge Complete, Standby

— 2000 3000 µA Charging

— 150 300 µA Charge Complete

— 100 300 µA Standby (No Battery or PROG

— 50 100 µA Shutdown (V

UVLO Start Threshold V

UVLO Stop Threshold V

UVLO Hysteresis V

START

STOP

HYS

3.4 3.55 3.7 V VDD Low to High

3.3 3.45 3.6 V VDD High to Low

— 100 — mV

Voltage Regulation (Constant Voltage Mode, System Test Mode)

Regulated Output Voltage V

REG

4.168 4.20 4.232 V VDD=[V

4.318 4.35 4.382 V I

4.367 4.40 4.433 V T

4.467 4.50 4.533 V

)

Line Regulation |(ΔV

Load Regulation |ΔV

BAT/VBAT

/ΔV

DD

/ V

BAT

|

BAT

— 0.10 0.30 %/V V

| — 0.10 0.30 % I

Supply Ripple Attenuation PSRR — 58 — dB I

—47— dBI

—25— dBI

Current Regulation (Fast Charge Constant Current Mode)

Fast Charge Current Regulation I

REG

90 100 110 mA PROG = 10 kΩ

900 1000 1100 mA PROG = 1.0 kΩ

Maximum Output Current Limit I

MAX

— 1200 — mA PROG < 833Ω

(Typ)+0.3V] to 6V, TA=-40°C to 85°C.

REG

Floating)

< V

V

< V

DD

OUT

=-5°C to +55°C

A

=[V

DD

I

OUT

V

=[V

DD

OUT

=-5°C to +55°C

T

A

DD

)

STOP

(Typ)+1V]

REG

=10 mA

(Typ)+1V] to 6V

REG

=10 mA

=10 mA to 100 mA

(Typ)+1V]

REG

=10 mA, 10Hz to 1 kHz

=10 mA, 10Hz to 10 kHz

=10 mA, 10Hz to 1 MHz

BAT

, or

MCP73833/4

DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise specified, all limits apply for VDD= [V

Typical values are at +25°C, V

Parameters Sym Min Typ Max Units Conditions

Preconditioning Current Regulation (Trickle Charge Constant Current Mode)

Precondition Current Ratio I

Precondition Voltage Threshold

Ratio

Precondition Hysteresis V

Charge Termination

Charge Termination Current Ratio I

Automatic Recharge

Recharge Voltage Threshold Ratio V

Pass Transistor ON-Resistance

ON-Resistance R

Battery Discharge Current

Output Reverse Leakage Current I

Status Indicators - STAT1, STAT2, PG

Sink Current I

Low Output Voltage V

Input Leakage Current I

PROG Input

Charge Impedance Range R

Standy Impedance R

Thermistor Bias

Thermistor Current Source I

Thermistor Comparator

Upper Trip Threshold V

Upper Trip Point Hysteresis V

Lower Trip Threshold V

Lower Trip Point Hysteresis V

System Test (LDO) Mode

Input High Voltage Level V

THERM Input Sink Current I

Bypass Capacitance C

DD

= [V

(Typ)+1.0V]

REG

PREG

V

PTH

TERM

RTH

DISCHARGE

THERM

T1HYS

T2HYS

/ I

/ V

PHYS

/ I

/ V

DSON

SINK

OL

LK

PROG

T1

T2

IH

SINK

BAT

REG

7.5 10 12.5 % PROG = 1.0 kΩ to 10 kΩ

15 20 25 % T

30 40 50 %

— 100 — %

64 66.5 70 % V

69 71.5 75 %

— 100 — mV V

3.75 5 6.25 % PROG = 1.0 kΩ to 10 kΩ

5.6 7.5 9.4 % T

7.5 10 12.5 %

15 20 25 %

— 94.0 — % V

— 96.5 — %

— 300 — mΩ VDD = 3.75V

— 0.15 2 µA PROG Floating

—0.25 2 µAV

—0.15 2 µAVDD < V

— -5.5 -15 µA Charge Complete

—1525mA

—0.4 1 VI

— 0.01 1 µA High Impedance, 6V on pin

1—20kΩ

70 — 200 kΩ Minimum Impedance for

47 50 53 µA 2 kΩ < R

1.20 1.23 1.26 V V

—-50—mV

0.235 0.25 0.265 V V

—50—mV

(VDD-0.1)

—— V

3 6 20 µA Stand-by or system test mode

1——µFI

4.7 — — µF I

(Typ)+0.3V] to 6V, TA=-40°C to 85°C.

REG

=-5°C to +55°C

A

Low to High

BAT

High to Low

BAT

=-5°C to +55°C

A

High to Low

BAT

= 105°C

T

J

< V

DD

BAT

STOP

= 4 mA

SINK

Standby

THERM

Low to High

THERM

High to Low

THERM

< 250 mA

OUT

> 250 mA

OUT

< 50 kΩ

DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise specified, all limits apply for VDD= [V

Typical values are at +25°C, V

DD

= [V

(Typ)+1.0V]

REG

Parameters Sym Min Typ Max Units Conditions

Automatic Power Down

Automatic Power Down Entry Threshold

Automatic Power Down Exit Thresh-

old

Timer Enable Input (TE

)

V

PDEXIT

Input High Voltage Level V

Input Low Voltage Level V

Input Leakage Current I

V

PD

—V

IH

IL

LK

2.0 — — V

——0.6 V

—0.01 1 µAV

+

BAT

50 mV

+

BAT

150 mV

Thermal Shutdown

Die Temperature T

Die Temperature Hysteresis T

SD

SDHYS

— 150 — °C

—10— °C

AC CHARACTERISTICS

Electrical Specifications: Unless otherwise specified, all limits apply for VDD= [V

Typical values are at +25°C, V

Parameters Sym Min Typ Max Units Conditions

UVLO Start Delay t

Current Regulation

Transition Time Out of Preconditioning t

Current Rise Time Out of Preconditioning t

Preconditioning Comparator Filter Time t

Termination Comparator Filter Time t

Comparator Filter Time t

Charge

Thermistor Comparator Filter Time t

Elapsed Timer

Elapsed Timer Period t

Status Indicators

Status Output turn-off t

Status Output turn-on t

DD

= [V

(Typ)+1.0V]

REG

START

DELAY

RISE

PRECON

TERM

CHARGE

THERM

ELAPSED

OFF

ON

—— 5 msV

—— 1 msV

—— 1 msI

0.4 1.3 3.2 ms Average V

0.4 1.3 3.2 ms Average I

0.4 1.3 3.2 ms Average V

0.4 1.3 3.2 ms Average THERM Rise/Fall

0 0 0 Hours Timer Disabled

3.6 4.0 4.4 Hours

5.4 6.0 6.6 Hours

7.2 8.0 8.8 Hours

— — 200 µs I

MCP73833/4

(Typ)+0.3V] to 6V, TA=-40°C to 85°C.

REG

— V 2.3V < V

VDD Falling

— V 2.3V < V

VDD Rising

(Typ)+0.3V] to 6V, TA=-40°C to 85°C.

REG

BAT

= 6V

TE

Low to High

DD

BAT<VPTH

Rising to 90% of I

OUT

= 1 mA to 0 mA

SINK

= 0 mA to 1 mA

SINK

< V

to V

BAT

OUT

BAT

REG

BAT>VPTH

REG

Rise/Fall

Falling

TEMPERATURE SPECIFICATIONS

Electrical Specifications: Unless otherwise specified, all limits apply for V

Typical values are at +25°C, V

DD

= [V

(Typ)+1.0V]

REG

Parameters Symbol Min Typ Max Units Conditions

Temperature Ranges

Specified Temperature Range T

Operating Temperature Range T

Storage Temperature Range T

A

-40 — +85 °C

-40 — +125 °C

-65 — +150 °C

Thermal Package Resistances

Thermal Resistance, MSOP-10 θ

Thermal Resistance, 3mm x 3mm DFN-10 θ

JA

— 113 — °C/W 4-Layer JC51-7 Standard

— 41 — °C/W 4-Layer JC51-7 Standard

DD

= [V

REG

(Typ)+0.3V] to 6V.

Board, Natural Convection

MCP73833/4

P

:

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 = 5.2V, V

REG

= 4.20V, I

= 10 mA and TA= +25°C, Constant-voltage mode.

OUT

4.210

4.205

4.200

4.195

4.190

(V)

4.185

4.180

4.175

Battery Regulation Voltage

4.170

4.50 4.75 5.00 5.25 5.50 5.75 6.00

Supply Voltage (V)

MCP73833

I

= 10 mA

OUT

I

= 100 mA

OUT

I

= 500 mA

OUT

I

= 900 mA

OUT

FIGURE 2-1: Battery Regulation Voltage (V

) vs. Supply Voltage (VDD).

BAT

4.220

MCP73833

4.210

4.200

4.190

4.180

I

= 500 mA

4.170

4.160

Battery Regulation Voltage (V)

OUT

I

= 900 mA

OUT

-40

-30

0

-20

-10

Ambient Temperature (°C)

10203040506070

I

OUT

I

OUT

= 10 mA

= 100 mA

80

1000

100

Charge Current (mA)

10

1 3 5 7 9 11 13 15 17 19 21

Programming Resistor (k:)

FIGURE 2-4: Charge Current (I Programming Resistor (R

104

103

102

101

100

99

98

Charge Current (mA)

97

96

4.50 4.75 5.00 5.25 5.50 5.75 6.00

Supply Voltage (V)

PROG

).

R

PROG

OUT

= 10 k

) vs.

FIGURE 2-2: Battery Regulation Voltage

) vs. Ambient Temperature (TA).

(V

BAT

0.40

A)

0.35

+85°C

0.30

-40°C

0.25

0.20

+25°C

0.15

0.10

0.05

Output Leakage Current (

0.00

3.00 3.20 3.40 3.60 3.80 4.00 4.20

Battery Regulation Voltage (V)

FIGURE 2-3: Output Leakage Current (I

DISCHARGE

(V

BAT

) vs. Battery Regulation Voltage

).

FIGURE 2-5: Charge Current (I Supply Voltage (V

1004

1002

1000

998

996

994

992

990

Charge Current (mA)

988

986

4.50 4.75 5.00 5.25 5.50 5.75 6.00

).

DD

Supply Voltage (V)

FIGURE 2-6: Charge Current (I Supply Voltage (V

DD

).

) vs.

OUT

R

= 1 k

PROG

) vs.

OUT

TYPICAL PERFORMANCE CURVES (Continued)

:

P

MCP73833/4

Note: Unless otherwise indicated, VDD = 5.2V, V

120

100

80

60

40

20

Charge Current (mA)

0

25354555657585

Junction Temperature (°C)

FIGURE 2-7: Charge Current (I Junction Temperature (T

1200

1000

800

600

400

200

Charge Current (mA)

0

25354555657585

Junction Temperature (°C)

).

J

R

= 10 k

PROG

95

105

115

125

135

) vs.

OUT

R

= 1 k

PROG

95

105

115

125

135

REG

145

= 4.20V, I

155

= 10 mA and TA= +25°C, Constant-voltage mode.

OUT

52.0

51.5

51.0

50.5

50.0

49.5

49.0

48.5

48.0

Thermistor Bias Current (µA)

-40

-30

0

-20

Ambient Temperature (°C)

10203040506070

-10

FIGURE 2-10: Thermistor Bias Current (I

THRERM

) vs. Ambient Temperature (TA).

0

VAC = 100 mVp-p

= 10 mA

I

OUT

-10

= 4.7 µF, X7R

C

OUT

-20

Ceramic

-30

-40

-50

Attenuation (dB)

-60

-70

0.01 0.1 1 10 100 1000

Frequency (kHz)

80

FIGURE 2-8: Charge Current (I Junction Temperature (T

52.0

A)

51.5

51.0

50.5

50.0

49.5

49.0

48.5

Thermistor Bias Current (

48.0

4.50 4.75 5.00 5.25 5.50 5.75 6.00

).

J

Supply Voltage (V)

FIGURE 2-9: Thermistor Bias Current (I

THRERM

) vs. Supply Voltage (VDD).

OUT

) vs.

FIGURE 2-11: Power Supply Ripple Rejection (PSRR).

0

VAC = 100 mVp-p

= 100 mA

I

OUT

-10

= 4.7 µF, X7R

C

OUT

Ceramic

-20

-30

-40

Attenuation (dB)

-50

-60

0.01 0.1 1 10 100 1000

Frequency (kHz)

FIGURE 2-12: Power Supply Ripple Rejection (PSRR).

MCP73833/4

:

TYPICAL PERFORMANCE CURVES (Continued)

Note: Unless otherwise indicated, VDD = 5.2V, V

14

12

10

8

6

4

I

2

Source Voltage (V)

0

-2 0

204060

Time (µs)

= 10 mA

OUT

= 4.7 µF, X7R

C

OUT

Ceramic

80

100

120

140

160

180

REG

0.10

0.05

0.00

-0.05

-0.10

-0.15

-0.20

-0.25

-0.30

200

FIGURE 2-13: Line Transient Response.

14

12

10

8

6

4

2

Source Voltage (V)

0

-2 0

204060

80

100

Time (µs)

I

= 100 mA

OUT

= 4.7 µF, X7R

C

OUT

Ceramic

120

140

160

0.10

0.05

0.00

-0.05

-0.10

-0.15

-0.20

-0.25

-0.30

180

200

= 4.20V, I

Output Ripple (V)

= 10 mA and TA= +25°C, Constant-voltage mode.

OUT

Output Current (A)

1.40

1.20

1.00

0.80

0.60

0.40

0.20

0.00

-0.20 0

C Ceramic

204060

= 4.7 µF, X7R

OUT

80

Time (µs)

100

120

140

0.10

0.05

0.00

-0.05

-0.10

-0.15

-0.20

-0.25

-0.30

160

180

200

FIGURE 2-16: Load Transient Response.

5.0

4.0

3.0

2.0

MCP73833-FCI/MF

1.0

Battery Voltage (V)

V

= 5.2V

DD

R

= 10.0 k

PROG

0.0 0

30

60

90

Time (Minutes)

120

150

180

200

160

120

80

40

0

210

Output Ripple (V)

Charge Current (A)

FIGURE 2-14: Line Transient Response.

Output Current (A)

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0.00

-0.05 0

204060

C

= 4.7 µF, X7R

OUT

Ceramic

80

Time (µs)

100

120

140

0.04

0.02

0.00

-0.02

-0.04

-0.06

-0.08

-0.10

-0.12

160

180

200

FIGURE 2-15: Load Transient Response.

Output Ripple (V)

FIGURE 2-17: Complete Charge Cycle (180 mA Li-Ion Battery).

5.0

4.0

3.0

2.0

Battery Voltage (V)

1.0

0.0 0246810

Time (Minutes)

MCP73833-FCI/MF

V

DD

R

= 10.0 k

PROG

= 5.2V

200

160

120

80

40

0

FIGURE 2-18: Charge Cycle Start Preconditioning (180 mAh Li-Ion Battery).

Charge Current (A)