MCP1642B/D Data Sheet - Microchip Technology

1 MCP1642B/D . Input Current Switch, 1 MHz Low-Voltage Start-Up Synchronous Boost Regulator Features General Description Up to 96% Typical Efficiency The MCP1642B/D devices are compact, Typical Peak Input Current Limit: high-efficiency, fixed-frequency, synchronous step-up - IOUT > 175 mA @ VIN, VOUT DC-DC converters. This family of devices provides an easy-to-use power supply solution for applications - IOUT > 600 mA @ VIN, VOUT. powered by either one-cell, two-cell, or three-cell - IOUT > 800 mA @ VIN, VOUT alkaline, Ultimate Lithium, NiCd, NiMH, one-cell Li-Ion - IOUT > 1A @ VIN > , VOUT or Li-Polymer batteries. Low Start-Up Voltage: , typical VOUT Low-voltage Technology allows the regulator to start-up @ 1 mA without high inrush current or output voltage overshoot Low Operating Input Voltage: , typical from a low voltage input.

2 High efficiency is VOUT @ 1 mA accomplished by integrating the low-resistance Output Voltage Range: N-Channel Boost switch and synchronous P-Channel switch. All compensation and protection circuitry are - Reference Voltage, VFB = integrated to minimize the number of external - to for the adjustable device option components. An open-drain Power Good output is - , , and for fixed VOUT provided to indicate when the output voltage is within options 10% of regulation and facilitates the interface with an Maximum Input Voltage VOUT < MCU. For standby applications, mcp1642b provides a PWM Operation: 1 MHz true output disconnect from input to output while in - Low Noise, Anti-Ringing Control shutdown (EN = GND). An additional device option (MCP1642D) is available and connects input to output Power Good Open-Drain Output bypass while in shutdown.

3 Both options consume less Internal Synchronous Rectifier than 1 A of input current. Internal Compensation For the adjustable (ADJ) device options, the output Inrush Current Limiting and Internal Soft-Start voltage is set by a small external resistor divider. Fixed Selectable, Logic-Controlled Shutdown States: VOUT device options do not require external divider - True Load Disconnect Option ( mcp1642b ) resistors. Two package options, 8-lead MSOP and 8- lead 2x3 DFN, are available. - Input-to-Output Bypass Option (MCP1642D). Shutdown Current (All States): 1 A Package Types Overtemperature Protection MCP1642B/D -xx MCP1642B/D -xx Available Packages: MSOP 2x3 DFN*. - 8-Lead MSOP EN 1 8 VIN. EN 1 8 VIN. - 8-Lead 2x3 DFN.

4 NC 2 7 SGND NC 2 EP 7 SGND. Applications PG 3 PG 3 9 6 PGND. 6 PGND. One, Two and Three-Cell Alkaline, Lithium VOUT 4 5 SW. Ultimate and NiMH/NiCd Portable Products VOUT 4 5 SW. Single-Cell Li-Ion to 5V Converters MCP1642B/D -ADJ MCP1642B/D -ADJ. PIC MCU Power MSOP 2x3 DFN*. USB Emergency Backup Charger from Batteries EN 1 8 VIN. EN 1 8 VIN. Personal Medical Products VFB 2 7 SGND VFB 2 EP 7 SGND. Wireless Sensors PG 3 6 PGND PG 3 9 6 PGND. Hand-Held Instruments GPS Receivers VOUT 4 5 SW. VOUT 4 5 SW. + to + Distributed Power Supply * Includes Exposed Thermal Pad (EP); see Table 3-1. 2014 Microchip Technology Inc. DS20005253A-page 1. MCP1642B/D . Typical Application L1. H. CIN VOUT. F SW VIN= to VOUT. VIN. + COUT.

5 mcp1642b -33. ALKALINE. NC F. PG. EN. - GND. ON. OFF. L. H. VOUT. CIN SW F VOUT. VIN= to VIN RTOP. MCP1642D-ADJ 976 k COUT. +. ALKALINE. VFB F. RBOT RPG. 309 k 1 M . EN. - ON. + OFF PG. ALKALINE.. GND. From PIC MCU I/O To PIC MCU I/O. - 100. 90. VIN = , VOUT = 80. Efficiency (%). 70. VIN = , VOUT = 60. 50. 40. 30. 20. 10. 0. 1 10 100 1000. IOUT (mA). DS20005253A-page 2 2014 Microchip Technology Inc. MCP1642B/D . 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 Absolute Maximum Ratings the device at those or any other conditions above those indicated in the operational sections of this EN, FB, VIN, VSW, VOUT GND.

6 + specification is not intended. Exposure to maximum EN, FB ..<maximum of VOUT or VIN > (GND ) rating conditions for extended periods may affect Output Short-Circuit Current .. Continuous device reliability. Output Current Bypass 800 mA. Power Dissipation .. Internally Limited Storage Temperature ..-65 C to +150 C. Ambient Temp. with Power C to +85 C. Operating Junction C to +125 C. ESD Protection On All Pins: 4 kV. 300V. DC CHARACTERISTICS. Electrical Characteristics: Unless otherwise indicated, VIN = , COUT = CIN = 10 F, L = H, VOUT = , IOUT = 15 mA, TA = +25 C, MCP1642B/D -ADJ. Boldface specifications apply over the TA range of -40 C to +85 C. Parameters Sym. Min. Typ. Max. Units Conditions Input Characteristics Minimum Start-Up Voltage VIN V Note 1.

7 V MCP1642B/D -50, Note 1. Minimum Input Voltage VIN V Note 1, Note 5. After Start-Up V Note 1, Note 5, MCP1642B/D -50. Output Voltage Adjust. VOUT V VOUT VIN ( MCP1642B/D -ADJ);. Range Note 2. ( MCP1642B/D -ADJ). Output Voltage VOUT V VIN < , MCP1642B/D -18, ( MCP1642B/D -XX) Note 2. V VIN < , MCP1642B/D -30, Note 2. V VIN < , MCP1642B/D -33, Note 2. V VIN < , MCP1642B/D -50, Note 2. Maximum Output Current IOUT 175 mA VIN, VOUT, Note 5. 300 mA VIN, VOUT, Note 5. 800 mA VIN, VOUT, Note 5. Feedback Voltage VFB V. Feedback Input IVFB nA Note 5. Bias Current Note 1: Resistive load, 1 mA. 2: For VIN > VOUT, VOUT will not remain in regulation. 3: IQPWM is measured from VOUT; VOUT is externally supplied with a voltage higher than the nominal output (device is not switching), no load.

8 VIN quiescent current will vary with boost ratio. VIN quiescent current can be estimated by: (IQPWM * (VOUT/VIN)). 4: 220 resistive load, VOUT (15 mA). 5: Determined by characterization, not production tested. 2014 Microchip Technology Inc. DS20005253A-page 3. MCP1642B/D . DC CHARACTERISTICS (CONTINUED). Electrical Characteristics: Unless otherwise indicated, VIN = , COUT = CIN = 10 F, L = H, VOUT = , IOUT = 15 mA, TA = +25 C, MCP1642B/D -ADJ. Boldface specifications apply over the TA range of -40 C to +85 C. Parameters Sym. Min. Typ. Max. Units Conditions Quiescent Current IQPWM 400 500 A Measured at VOUT, EN = VIN, PWM Mode IOUT = 0 mA, Note 3. Quiescent Current IQSHDN 1 A VOUT = EN = GND, IOUT = 0 mA. Shutdown includes N-Channel and P-Channel Switch Leakage NMOS Switch Leakage INLK A VIN = VSW = 5V, VOUT = , VEN = VFB = GND.

9 PMOS Switch Leakage IPLK A VIN = VSW = GND, VOUT = NMOS Switch RDS(ON)N VIN = , ISW = 250 mA, Note 5. ON Resistance PMOS Switch RDS(ON)P VIN = , ISW = 250 mA, Note 5. ON Resistance NMOS Peak IN(MAX) A Note 5. Switch Current Limit Accuracy VFB% -3 3 % MCP1642B/D -ADJ, VIN = VOUT% -3 3 % MCP1642B/D -18, VIN = -3 3 % MCP1642B/D -30, VIN = -3 3 % MCP1642B/D -33, VIN = -3 3 % MCP1642B/D -50, VIN = Line Regulation VFB/VFB) %/V MCP1642B/D -ADJ, / VIN| VIN = to , IOUT = 25 mA. VOUT/VOUT) %/V MCP1642B/D -18, / VIN| VIN = to , IOUT = 25 mA. %/V MCP1642B/D -30, VIN = to , IOUT = 25 mA. %/V MCP1642B/D -33, VIN = to , IOUT = 25 mA. %/V MCP1642B/D -50, VIN = to , IOUT = 25 mA. Load Regulation VFB/VFB| % IOUT = 25 mA to 150 mA, VIN = VOUT/VOUT| % MCP1642B/D -18, VIN = , IOUT = 25 mA to 75 mA.

10 % MCP1642B/D -30, VIN = , IOUT = 25 mA to 125 mA. % MCP1642B/D -33, VIN = , IOUT = 25 mA to 150 mA. % MCP1642B/D -50, VIN = , IOUT = 25 mA to 500 mA, Note 5. Note 1: Resistive load, 1 mA. 2: For VIN > VOUT, VOUT will not remain in regulation. 3: IQPWM is measured from VOUT; VOUT is externally supplied with a voltage higher than the nominal output (device is not switching), no load. VIN quiescent current will vary with boost ratio. VIN quiescent current can be estimated by: (IQPWM * (VOUT/VIN)). 4: 220 resistive load, VOUT (15 mA). 5: Determined by characterization, not production tested. DS20005253A-page 4 2014 Microchip Technology Inc. MCP1642B/D . DC CHARACTERISTICS (CONTINUED). Electrical Characteristics: Unless otherwise indicated, VIN = , COUT = CIN = 10 F, L = H, VOUT = , IOUT = 15 mA, TA = +25 C, MCP1642B/D -ADJ.