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

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

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

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

V

OUT

(V

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

)

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

PDEXIT

PD

Exit Threshold

Thermal Shutdown

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

PROG

< V

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

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

) vs.

= 5

FIGURE 2-3: Output Leakage Current (I

DISCHARGE

(V

).

BAT

) vs. Battery Regulation Voltage

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

DD

) - MCP73812.

PROG

) - MCP73812.

OUT

) vs.

FIGURE 2-11: Charge Current (I Ambient Temperature (T

) - MCP73812.

A

FIGURE 2-12: Charge Current (I Ambient Temperature (T

) - MCP73812.

A

OUT

) 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).

) - MCP73812.

J

OUT

) vs.

FIGURE 2-17: Line Transient Response.

FIGURE 2-18: Line Transient Response.