Simple, Miniature Single-Cell, Fully Integrated Li …

1 MCP73811/2. simple , Miniature single -Cell, Fully Integrated Li-Ion / Li-Polymer Charge Management Controllers Features Description Complete Linear Charge Management Controller The MCP73811/2 devices are linear charge manage- - Integrated Pass Transistor ment controllers that are designed for use in space - Integrated Current Sense limited and cost sensitive applications. The MCP73811/2 provide specific charge algorithms for - Integrated Reverse Discharge Protection single cell Li-Ion or Li-Polymer battery to achieve Constant Current / Constant Voltage Operation optimal capacity in the shortest charging time possible. with Thermal Regulation Along with its small physical size, the low number of High Accuracy Preset Voltage Regulation: + 1% external components required make the MCP73811/2.

2 Voltage Regulation: ideally suited for portable applications. For applications Selectable Charge Current: charging from a USB port, the MCP73811 adheres to all the specifications governing the USB power bus. - MCP73811: 85 mA / 450 mA. Programmable Charge Current: The MCP73811/2 employ a constant current/constant voltage charge algorithm. The constant voltage regula- - MCP73812: 50 mA - 500 mA. tion is fixed at , with a tight regulation tolerance of Minimum External Components Required: 1%. For the MCP73811, the constant current value is - MCP73811: 2 Ceramic Capacitors selected as 85 mA (low power USB port) or 450 mA. - MCP73812: 2 Ceramic Capacitors and (high power USB port) with a digital input signal on the 1 Resistor PROG input. For the MCP73812, the constant current No Preconditioning value is set with one external resistor.

3 The External End-of-Charge Control MCP73811/2 limit the charge current based on die temperature during high power or high ambient Automatic Power-Down when Input Power conditions. This thermal regulation optimizes the Removed charge cycle time while maintaining device reliability. Active High Charge Enable The MCP73811/2 are Fully specified over the ambient Temperature Range: temperature range of -40 C to +85 C. The - -40 C to +85 C MCP73811/2 are available in a 5-Lead, SOT-23. Packaging: package. - 5-Lead SOT-23. Package Types Applications 5-Pin SOT-23. Low-Cost Lithium-Ion/Lithium-Polymer Battery Chargers Rechargeable Toys CE 1 5 PROG. Electronic Cigarettes Bluetooth Headsets 2. VSS. USB Chargers VBAT 3 4 VDD. 2007 Microchip Technology Inc. DS22036B-page 1.

4 MCP73811/2. Typical Applications 450 mA Li-Ion Battery Charger 500 mA Li-Ion Battery Charger VIN 4 VBAT 3 VIN 4 V VBAT 3. VDD + single DD + single 1 F 1 F Li-Ion 1 F 1 F Li-Ion - Cell - Cell 5 PROG 5. PROG. 2 k . 1 VSS 2 1 CE VSS 2. CE. MCP73811 MCP73812. Functional Block Diagram Direction Control VDD VBAT. 6 A. MCP73812 MCP73811. G= CA. +. k - PROG. 12 k k . VA. +. Reference - Generator 111 k . k . VREF ( ) Direction Control +. k . VBAT - Charge Enable CE. +. VSS - DS22036B-page 2 2007 Microchip Technology Inc. MCP73811/2. ELECTRICAL Notice: Stresses above those listed under Maximum Ratings may cause permanent damage to the device. CHARACTERISTICS This is a stress rating only and functional operation of the device at those or any other conditions above those Absolute Maximum Ratings indicated in the operational listings of this specification VDDN.

5 Is not implied. Exposure to maximum rating conditions All Inputs and Outputs VSS .. to (VDD+ )V for extended periods may affect device reliability. Maximum Junction Temperature, TJ .. Internally Limited Storage temperature ..-65 C to +150 C. ESD protection on all pins Human Body Model ( kW in Series with 100 pF) .. 4 kV. Machine Model (200pF, No Series Resistance) ..400V. DC CHARACTERISTICS. Electrical Specifications: Unless otherwise indicated, all limits apply for VDD= [VREG(typ.) + ] to 6V, TA = -40 C to +85 C. Typical values are at +25 C, VDD = [VREG (typ.) + ]. Parameters Sym Min Typ Max Units Conditions Supply Input Supply Voltage VDD 6 V. Supply Current ISS 1000 1500 A Charging 50 100 A Standby (CE = VSS). 5 A Shutdown (VDD < VBAT - 100 mV).

6 Voltage Regulation (Constant Voltage Mode). Regulated Output Voltage VREG V VDD=[VREG(Typ)+1V]. IOUT=10 mA. Output Voltage Tolerance VRTOL -1 +1 % TA=-5 C to +55 C. Line Regulation |( VBAT/VBAT) %/V VDD=[VREG(Typ)+1V] to 6V. / VDD| IOUT=10 mA. Load Regulation | VBAT/VBAT| % IOUT=10 mA to 50 mA. VDD=[VREG(Typ)+1V]. Supply Ripple Attenuation PSRR 52 dB IOUT=10 mA, 10 Hz to 1 kHz 47 dB IOUT=10 mA, 10 Hz to 10 kHz 22 dB IOUT=10 mA, 10 Hz to 1 MHz Current Regulation (Fast Charge Constant-Current Mode). Fast Charge Current IREG 85 mA MCP73811 - PROG = Low Regulation 450 mA MCP73811 - PROG = High 50 mA MCP73812 - PROG = 20 k . 100 mA MCP73812 - PROG = 10 k . 500 mA MCP73812 - PROG = 2 k . Charge Current Tolerance IRTOL -10 +10 % TA=-5 C to +55 C. Pass Transistor ON-Resistance ON-Resistance RDSON 400 m VDD = , TJ = 105 C.

7 Battery Discharge Current Output Reverse Leakage IDISCHARGE. Current 2 A Shutdown (VDD < VBAT - 100 mV). 2007 Microchip Technology Inc. DS22036B-page 3. MCP73811/2. DC CHARACTERISTICS (Continued). Electrical Specifications: Unless otherwise indicated, all limits apply for VDD= [VREG(typ.) + ] to 6V, TA = -40 C to +85 C. Typical values are at +25 C, VDD = [VREG (typ.) + ]. Parameters Sym Min Typ Max Units Conditions Charge Enable (CE), PROG Input - MCP73811. Input High Voltage Level VIH 2 V. Input Low Voltage Level VIL V. Input Leakage Current ILK 1 A VCE = VDD, VPROG = VDD. PROG Input - MCP73812. Charge Impedance Range RPROG 2 20 k MCP73812. Automatic Power Down (Direction Control). Automatic Power Down VPD VBAT + VBAT + V < VBAT < VREG. Entry Threshold 10 mV 50 mV VDD Falling Automatic Power Down VPDEXIT VBAT + VBAT + V < VBAT < VREG.

8 Exit Threshold 150 mV 250 mV VDD Rising Thermal Shutdown Die Temperature TSD 150 C. Die Temperature TSDHYS 10 C. Hysteresis TEMPERATURE SPECIFICATIONS. Electrical Specifications: Unless otherwise indicated, all limits apply for VDD = [VREG (typ.) + ] to 6V. Typical values are at +25 C, VDD = [VREG (typ.) + ]. Parameters Sym Min Typ Max Units Conditions Temperature Ranges Specified Temperature Range TA -40 +85 C. Operating Temperature Range TJ -40 +125 C. Storage Temperature Range TA -65 +150 C. Thermal Package Resistances Thermal Resistance, 5-Lead, SOT-23 JA 230 C/W 4-Layer JC51-7 Standard Board, Natural Convection DS22036B-page 4 2007 Microchip Technology Inc. MCP73811/2. 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.

9 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 ( , outside specified power supply range) and therefore outside the warranted range. Note: Unless otherwise indicated, VDD = [VREG(typ.) + 1V], IOUT = 10 mA and TA= +25 C, Constant-voltage mode. 90. Battery Regulation Voltage 89 PROG = Low Temp = +25 C. Charge Current (mA). IOUT = 10 mA 88. 87. 86. (V). IOUT = 100 mA 85. 84. IOUT = 450 mA 83. 82. 81. 80. 5 6. Supply Voltage (V) Supply Voltage (V). FIGURE 2-1: Battery Regulation Voltage FIGURE 2-4: Charge Current (IOUT) vs. (VBAT) vs. Supply Voltage (VDD). Supply Voltage (VDD) - MCP73811. 460. Battery Regulation Voltage (V). PROG = High 455 Temp = 25 C.

10 Charge Current (mA). IOUT = 10 mA. 450. 445. IOUT = 100 mA 440. 435. IOUT = 450 mA. 430. 425. -40. -30. -20. -10. 0. 10. 20. 30. 40. 50. 60. 70. 80. 5 6. Ambient Temperature ( C) Supply Voltage (V). FIGURE 2-2: Battery Regulation Voltage FIGURE 2-5: Charge Current (IOUT) vs. (VBAT) vs. Ambient Temperature (TA). Supply Voltage (VDD) - MCP73811. 100. PROG = Low Output Leakage Current ( A). 95 VDD = 5V. Charge Current (mA). +85 C. 90. -40 C. 85. 80. +25 C. 75. 70. 65. -40 -30 -20 -10 0 10 20 30 40 50 60 70 80. Battery Regulation Voltage (V) Ambient Temperature ( C). FIGURE 2-3: Output Leakage Current FIGURE 2-6: Charge Current (IOUT) vs. (IDISCHARGE) vs. Battery Regulation Voltage Ambient Temperature (TA) - MCP73811. (VBAT). 2007 Microchip Technology Inc.