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.

2 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. 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.

3 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. 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.

4 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.

5 2007 Microchip Technology Inc. DS22036B-page 1. 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.

6 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 .. 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.

7 -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). Voltage Regulation (Constant Voltage Mode).

8 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.

9 100 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. 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.)]

10 + ]. 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. Exit Threshold 150 mV 250 mV VDD Rising Thermal Shutdown Die Temperature TSD 150 C.