9-0732; Rev 2; 12/10 KIT ATION EVALU E L B AVAILA Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices Maxim’s Smart Power Selector™ (SPS) safely distributes power between an external power source (AC adapter, auto adapter, or USB source), battery, and the system load. When system load peaks exceed the external source capability, the battery supplies supplemental current. When system load requirements are small, residual power from the external power source charges the battery.
MAX8662/MAX8663 Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices ABSOLUTE MAXIMUM RATINGS LX3 to GND ............................................................-0.3V to +33V DC_ to GND..............................................................-0.3V to +9V BAT_, CEN, CHG, EN_, PEN_, POK, PV_, PWM, SYS_, LX1, CS, LX2 to GND .................................-0.3V to +6V VL to GND ................................................................-0.
Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices (VDC = 5V, VBAT = 4V, VCEN = 0V, VPEN_ = 5V, RPSET = 3kΩ, RISET = 3.15kΩ, CCT = 0.068µF, TA = -40°C to +85°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS RBAT_REG VDC = 0V, VBAT = 4.2V, ISYS = 1A MIN TYP MAX UNITS 40 80 mΩ 50 100 150 mV TA = +25°C 4.179 4.200 4.221 TA = -40°C to +85°C 4.158 4.200 4.
MAX8662/MAX8663 Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices ELECTRICAL CHARACTERISTICS (Input Limiter and Battery Charger) (continued) (VDC = 5V, VBAT = 4V, VCEN = 0V, VPEN_ = 5V, RPSET = 3kΩ, RISET = 3.15kΩ, CCT = 0.068µF, TA = -40°C to +85°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS THERMISTOR INPUT (THM) THM Internal Pullup Resistance kΩ 10 THM Resistance Threshold, Hot Resistance falling (1% hysteresis) 3.73 3.97 4.
Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices (VSYS_ = VPV_ = VIN45 = VIN67 = 4.0V, VBRT = 1.25V, circuit of Figure 1, TA = -40°C to +85°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS From VFB1 = 0.98V, IOUT1 = 0 to 1200mA, VOUT1 = 0.98V to 3.3V FB Regulation Accuracy MIN -3 FB1 Input Leakage Current pMOS On-Resistance ILX1 = 100mA nMOS On-Resistance ILX1 = 100mA TYP MAX UNITS +3 % µA 0.01 0.10 VPV1 = 3.3V 0.12 0.24 VPV1 = 2.6V 0.15 VPV1 = 3.3V 0.
MAX8662/MAX8663 Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices ELECTRICAL CHARACTERISTICS (Output Regulator) (continued) (VSYS_ = VPV_ = VIN45 = VIN67 = 4.0V, VBRT = 1.25V, circuit of Figure 1, TA = -40°C to +85°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS OVP Leakage Current VEN3 = 0V, VOVP = VSYS = 5.5V nMOS On-Resistance ILX3 = 100mA nMOS Off-Leakage Current VLX3 = 30V MIN TYP MAX TA = +25°C 0.01 1 TA = +85°C 0.1 0.6 1.2 TA = +25°C 0.01 5.
Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices (VSYS_ = VPV_ = VIN45 = VIN67 = 4.0V, VBRT = 1.25V, circuit of Figure 1, TA = -40°C to +85°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 16 25 µA +1.5 % LINEAR REGULATOR 5 (LDO5) Supply Current At IN45, VEN4 = 0V Voltage Accuracy IOUT5 = 0 to 150mA, VIN45 = VOUT5 + 0.3V to 5.5V with 1.7V (min) -1.5 Guaranteed stability, ESR < 0.05Ω 0.
Typical Operating Characteristics (Circuit of Figure 1, VDC = 5V, RPSET = 1.5kΩ, RISET = 3kΩ, VOUT1 = 3.3V, VOUT2 = 1.3V, SL1 = SL2 = open, VCEN = 0V, VPEN1 = VPEN2 = 5V, COUT1 = 2 x 10µF, COUT2 = 2 x 10µF, COUT3 = 0.1µF, COUT4 = 4.7µF, COUT5 = 1µF, COUT6 = 2.2µF, COUT7 = 1µF, CT = 0.068µF, CREF = CVL = 0.1µF, RTHM = 10kΩ, L1 = 3.3µH, L2 = 4.7µH, L3 = 22µH, VGND = VPG1 = VPG2 = VPG3 = 0V, TA = +25°C, unless otherwise noted.) 0.6 0.4 1.0 0.8 0.6 0.4 0.2 0.2 0 0 0 1 2 3 4 5 6 7 8 2 3 0.3 0.
Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices 400 VDC = 5.0V, VBAT = 4.0V RISET = 3kΩ, CEN = 0, EN_ = 0 300 200 5.0 PEN1 = 0, PEN2 = 1 500 400 300 0 -15 10 35 85 60 CHARGER ENABLED 4.0 3.8 0 -40 4.6 4.2 PEN1 = PEN2 = 0 100 CHARGER DISABLED 4.8 4.4 VDC = 6.5V, VBAT = 3.1V RISET = 3kΩ, CEN = 0, EN_ = 0 200 PEN1 = PEN2 = 0 100 3.
Typical Operating Characteristics (continued) (Circuit of Figure 1, VDC = 5V, RPSET = 1.5kΩ, RISET = 3kΩ, VOUT1 = 3.3V, VOUT2 = 1.3V, SL1 = SL2 = open, VCEN = 0V, VPEN1 = VPEN2 = 5V, COUT1 = 2 x 10µF, COUT2 = 2 x 10µF, COUT3 = 0.1µF, COUT4 = 4.7µF, COUT5 = 1µF, COUT6 = 2.2µF, COUT7 = 1µF, CT = 0.068µF, CREF = CVL = 0.1µF, RTHM = 10kΩ, L1 = 3.3µH, L2 = 4.7µH, L3 = 22µH, VGND = VPG1 = VPG2 = VPG3 = 0V, TA = +25°C, unless otherwise noted.
Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices OUT1 REGULATOR LIGHT-LOAD SWITCHING WAVEFORMS OUT1 REGULATOR HEAVY-LOAD SWITCHING WAVEFORMS MAX8662/63 toc25 MAX8662/63 toc26 VBAT = 4.0V IOUT1 = 10mA VOUT1 AC-COUPLED 50mV/div VLX VOUT1 AC-COUPLED 2V/div IL 10mV/div 2V/div VLX 200mA/div IL 500mA/div VBAT = 4.
Typical Operating Characteristics (continued) (Circuit of Figure 1, VDC = 5V, RPSET = 1.5kΩ, RISET = 3kΩ, VOUT1 = 3.3V, VOUT2 = 1.3V, SL1 = SL2 = open, VCEN = 0V, VPEN1 = VPEN2 = 5V, COUT1 = 2 x 10µF, COUT2 = 2 x 10µF, COUT3 = 0.1µF, COUT4 = 4.7µF, COUT5 = 1µF, COUT6 = 2.2µF, COUT7 = 1µF, CT = 0.068µF, CREF = CVL = 0.1µF, RTHM = 10kΩ, L1 = 3.3µH, L2 = 4.7µH, L3 = 22µH, VGND = VPG1 = VPG2 = VPG3 = 0V, TA = +25°C, unless otherwise noted.) OUT2 VOLTAGE vs. TEMPERATURE MAX8662/63 toc32 1.
Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices LED CURRENT vs. PWM DIMMING DUTY CYCLE 5.0 VCEN = VL R OUT2 = 33I VBAT = 3.6V VBRT = 0.25V f = 1kHz 4.5 IDC 200mA/div VEN2 3.5 3.0 2.5 2.0 1.5 1.0 2V/div VBAT = 3.6V 25 LED CURRENT (mA) 1V/div LED CURRENT (mA) 4.0 VOUT2 LED CURRENT vs. BRT VOLTAGE 30 MAX8662/63 toc40 MAX8662 toc38 MAX8662/63 toc39 OUT2 ENABLE AND DISABLE RESPONSE 20 15 10 5 0.5 0 0 0 10 20 30 40 50 0 60 70 80 90 100 0.
Typical Operating Characteristics (continued) (Circuit of Figure 1, VDC = 5V, RPSET = 1.5kΩ, RISET = 3kΩ, VOUT1 = 3.3V, VOUT2 = 1.3V, SL1 = SL2 = open, VCEN = 0V, VPEN1 = VPEN2 = 5V, COUT1 = 2 x 10µF, COUT2 = 2 x 10µF, COUT3 = 0.1µF, COUT4 = 4.7µF, COUT5 = 1µF, COUT6 = 2.2µF, COUT7 = 1µF, CT = 0.068µF, CREF = CVL = 0.1µF, RTHM = 10kΩ, L1 = 3.3µH, L2 = 4.7µH, L3 = 22µH, VGND = VPG1 = VPG2 = VPG3 = 0V, TA = +25°C, unless otherwise noted.
Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices OUT5 REGULATOR LOADTRANSIENT RESPONSE OUT5 REGULATOR LINETRANSIENT RESPONSE MAX8662/63 toc55 MAX8662/63 toc54 5V VIN45 IOUT5 3.6V 2V/div 100mA/div VOUT5 AC-COUPLED VOUT5 AC-COUPLED 50mV/div 20mV/div IOUT5 = 10mA VBAT = 4.0V IOUT5 = 10mA TO 150mA TO 10mA 100µs/div 40µs/div 70 MAX8662 toc56 VCEN = VL R OUT5 = 33I THE SLOPE OF THIS LINE SHOWS THAT THE DROPOUT RESISTANCE OF AN AVERAGE PART AND BOARD COMBINATION IS 384mΩ.
Typical Operating Characteristics (continued) (Circuit of Figure 1, VDC = 5V, RPSET = 1.5kΩ, RISET = 3kΩ, VOUT1 = 3.3V, VOUT2 = 1.3V, SL1 = SL2 = open, VCEN = 0V, VPEN1 = VPEN2 = 5V, COUT1 = 2 x 10µF, COUT2 = 2 x 10µF, COUT3 = 0.1µF, COUT4 = 4.7µF, COUT5 = 1µF, COUT6 = 2.2µF, COUT7 = 1µF, CT = 0.068µF, CREF = CVL = 0.1µF, RTHM = 10kΩ, L1 = 3.3µH, L2 = 4.7µH, L3 = 22µH, VGND = VPG1 = VPG2 = VPG3 = 0V, TA = +25°C, unless otherwise noted.
Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices MAX8662/63 toc68 MAX8662/63 toc69 5V 3.6V VIN67 IOUT7 2V/div 100mA/div 50mV/div VOUT7 AC-COUPLED 20mV/div VOUT7 AC-COUPLED IOUT7 = 10mA VBAT = 4.0V IOUT7 = 10mA TO 150mA TO 10mA 40µs/div 100µs/div OUT7 REGULATOR DROPOUT VOLTAGE vs. LOAD CURRENT IDC 200mA/div VEN7 DROPOUT VOLTAGE (V) 2V/div VOUT7 THE SLOPE OF THIS LINE SHOWS THAT THE DROPOUT RESISTANCE OF AN AVERAGE PART AND BOARD COMBINATION IS 391mΩ. 60 2V/div 50 3.
MAX8662/MAX8663 Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices Pin Description PIN NAME FUNCTION MAX8662 MAX8663 1 1 PEN1 Input Limiter-Control Input 1. Used with CEN and PEN2 to set the DC current limit to 95mA, 475mA, a resistor programmable level up to 2A, or to turn off the input limiter (see Table 1). 2 2 PEN2 Input Limiter-Control Input 2.
Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices PIN NAME FUNCTION 16 IN45 Input Supply for Linear Regulators 4 and 5. Connect IN45 to a supply voltage between 1.7V and VSYS. Connect at least a 1µF ceramic capacitor from IN45 to GND. 20 17 OUT5 Linear Regulator 5 Output. Delivers up to 150mA at an output voltage determined by SL1 and SL2. Connect a 1µF ceramic capacitor from OUT5 to GND. Increase the value to 2.2µF if VOUT5 < 1.5V.
MAX8662/MAX8663 Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices Pin Description (continued) PIN NAME FUNCTION MAX8662 MAX8663 40 — PG3 41 33 OUT6 Linear Regulator 6 Output. Delivers up to 300mA at an output voltage determined by SL1 and SL2. Connect a 2.2µF ceramic capacitor from OUT6 to GND. Increase the value to 4.7µF if VOUT6 < 1.5V. 42 34 IN67 Input Supply for Linear Regulators 6 and 7. Connect IN67 to a supply voltage of 1.7V to VSYS.
Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices DC1 SYS1 DC2 SYS2 MAX8662/MAX8663 INPUT FROM AC ADAPTER/USB 4.1V TO 8V SYS C1 VLOGIC C10 + R1 POK INPUTVOLTAGE MONITOR GND VL - INPUT-TO-SYS CURRENTLIMITING SWITCH BAT1 BATTERY-TO-SYS SWITCH (ALLOWS BAT AND DC TO SUPPLY CURRENT TO SYS) 3.
MAX8662/MAX8663 Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices Detailed Description The MAX8662/MAX8663 highly integrated PMICs are designed for use in smart cellular phones, PDAs, Internet appliances, and other portable devices. They integrate two synchronous buck regulators, a boost regulator driving two to seven white LEDs (MAX8662 only), four low dropout (LDO) linear regulators, and a linear charger for a single-cell Li+ battery.
Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices • Thermal Limiting: The input limiter includes a thermal-limiting circuit that reduces the current drawn from DC when the IC junction temperature increases beyond +100°C in an attempt to prevent further heating. The current limit is be reduced by 5%/°C for temperatures above +100°C, dropping to 0mA at +120°C.
MAX8662/MAX8663 Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices Power-OK Output (POK) DC Input Current-Limit Selection (PEN1/PEN2) POK is an active-low open-drain output indicating DC status. When the voltage at DC is between the undervoltage and the overvoltage thresholds, and is greater than the BAT voltage, POK pulls low to indicate that input power is OK. Otherwise, POK is high impedance. POK is not affected by the states of PEN1, PEN2, or CEN.
Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices MONITORING THE BATTERY CHARGE CURRENT WITH VISET ISET VOLTAGE (V) VISET = RISET 1556 x IBAT 1.5 0 DISCHARGING Charge Current ISET adjusts the MAX8662/MAX8663 charging current to match the capacity of the battery. A resistor from ISET to ground sets the maximum fast-charge current, the charge current in prequal, and the charge-current threshold below which the battery is considered completely charged.
MAX8662/MAX8663 Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices Connect CT to GND to disable the prequalification and fast-charge timers, allowing the battery to charge indefinitely in top-off mode, or if other system timers are to be used to control charging. Charge-Enable Input (CEN) Driving CEN high disables the battery charger. Driving CEN low enables the charger when a valid source is connected at DC.
Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices 10kΩ SWITCH OPEN WHEN CHARGER DISABLED MAX8662 MAX8663 55.71kΩ VTHM_C = 2.4V RISING (TYP) + 97.71kΩ VTHM_H = 0.9V FALLING (TYP) THM + COLD 60mV HYST BAD TEMP HOT 60mV HYST DISABLE CHARGER THERMAL CONNECTION 54.43kΩ ESD DIODE VTHM_D = 0.1V FALLING (TYP) + - ENABLE THM 60mV HYST 6.43kΩ GND GND Figure 6. Thermistor Input Figure 6 shows a simplified version of the THM input.
MAX8662/MAX8663 Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices skip mode, the synchronous rectifier turns off when the inductor current falls below the n-channel zero-crossing threshold or at the end of the switching cycle, whichever occurs first. Setting OUT1 and OUT2 Output Voltage Select an output voltage for OUT1 between 0.98V and VIN by connecting FB1 to the center of a resistive voltage-divider between OUT1 and GND.
Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices The RC compensation network from CC3 to GND affects the WLED driver’s sink current ramp time. As shown in the OUT3 Enable and Disable Response graph in the Typical Operating Characteristics section, the OUT3 voltage ramps up in 1.25ms, but the WLED sink current of 30mA settles in 12ms. This 12ms is associated with the compensation of 1kΩ in series with 0.22µF. Smaller RC time constants reduce the WLED sink current ramp time.
MAX8662/MAX8663 Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices DC OVLO When the DC voltage is above the DC overvoltage threshold (VOVLO_DC, typically 6.9V), the MAX8662/ MAX8663 enter DC overvoltage lockout (DC OVLO). DC OVLO mode protects the MAX8662/MAX8663 and downstream circuitry from high-voltage stress up to 9V. In DC OVLO, VL is on, Q1 (Figure 2) is open, the charger is disabled, POK is high-Z, and CHG is high-Z.
Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices MAX8662/MAX8663 Table 4. External Components List (See Figure 1) (continued) COMPONENT FUNCTION PART C13 Boost input bypass capacitor 1.0µF ±10%, 16V X5R ceramic capacitor (0603) Murata GRM188R61C105KA93B or Taiyo Yuden EMK107BJ105KA C14 Step-up output filter capacitor 0.
MAX8662/MAX8663 Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices Power Dissipation The MAX8662/MAX8663 have a thermal-limiting circuitry, as well as a shutdown feature to protect the IC from damage when the die temperature rises. To allow the maximum charging current and load current on each regulator, and to prevent thermal overload, it is important to ensure that the heat generated by the MAX8662/MAX8663 is dissipated into the PCB.
Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices FB1 EN1 PG1 LX1 PV1 PV2 FB2 LX2 PG2 EN2 TOP VIEW 30 29 28 27 26 25 24 23 22 21 EN6 31 20 PWM EN7 32 19 EN5 OUT6 33 18 EN4 IN67 34 17 OUT5 OUT7 35 16 IN45 MAX8663 VL 36 14 GND SL2 38 13 CT 4 5 6 7 8 9 10 DC2 SYS1 SYS2 BAT1 BAT2 CHG CEN 3 DC1 11 THM PEN2 12 ISET POK 40 PEN1 PSET 39 2 PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO.
MAX8662/MAX8663 Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices Revision History REVISION NUMBER REVISION DATE 0 2/07 Initial release — 1 12/08 Updated Figure 1 21 2 12/10 Updated Electrical Characteristics table, TOCs 29, 38, 42, 49, 56, 63, and 70, Figures 3, 4, 5, and 6, OUT3 Compensation section DESCRIPTION PAGES CHANGED 5, 6, 7, 11, 13–17, 23, 24, 25, 27, 28, 29 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Ma
