MAX8819A MAXIM [Maxim Integrated Products], MAX8819A Datasheet
MAX8819A
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MAX8819A Summary of contents
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... Handheld Instrumentation PDAs Ordering Information PIN- PART TEMP RANGE PACKAGE MAX8819AETI+ -40°C to +85°C 28 TQFN-EP* MAX8819BETI+ -40°C to +85°C 28 TQFN-EP* MAX8819CETI+ -40°C to +85°C 28 TQFN-EP* + Denotes a lead(Pb)-free/RoHS-compliant package Exposed pad. Smart Power Selector is a trademark of Maxim Integrated Products, Inc. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’ ...
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... V rising, 300mV typical hysteresis 5.75V DLIM[1: SYS for MAX8819B SYS DLIM[1: DCLIM 4V for MAX8819A/ DLIM[1: MAX8819C DLIM[1: (suspend) DLIM[1:2] ≠ 11 0mA, I SYS EN123 = low, EN4 = low, CEN = high, I DCIQ V = 5.5V DC DLIM[1:2] ≠ 11 0mA, EN123 = low, ...
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... BAT Leakage Current _______________________________________________________________________________________ = 4V, DLIM[1:2] = 00, EN123 = EN4 = low, V BAT CISET CONDITIONS V falling, 100mV hysteresis SYS DC and BAT are delivering current to SYS 95mA 4.3V, BSREG BAT DC MAX8819A/MAX8819C (only 0V, EN123 = low, EN4 = low BAT = 5V, DLIM[1:2] ≠ 11, EN123 = low EN4 = low BAT I + SYS ...
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... 1.01V FB1 T = +85° 100mA to 300mA OUT1 (Note 4.0V 180mA PV13 LX1 V = 4.0V 180mA PV13 LX1 MAX8819A/MAX8819B MAX8819C = 1.1V, V FB1 FB2 FB3 = 3kΩ, unless otherwise noted.) (Note 3) MIN TYP MAX 333 1.5 0.3 1.2 +15 250 300 350 700 750 800 ...
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... T = +85° 100mA to 300mA OUT2 (Note 4.0V 180mA PV2 LX2 V = 4.0V 180mA PV2 LX2 MAX8819A/MAX8819B MAX8819C (Note 8) f OSC EN123 = low, resistance from LX2 to PG2 ∆ 0V, REG2 disabled (Note 10) SYS PV2 PV13 supplied from SYS = 1.1V, V FB1 FB2 FB3 = 3kΩ ...
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... L = 4.7µ 0.13Ω LSR (Note +25° 1.01V FB3 T = +85° 100mA to 300mA OUT3 (Note 9) MAX8819A/MAX8819B MAX8819C (Note 4.0V 180mA PV13 LX3 V = 4.0V 180mA PV13 LX3 f OSC EN123 = low, resistance from LX3 to PG3 Power supplied from SYS (see Figure 1) V ...
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PMIC with Integrated Chargers and Smart Power Selector in a 4mm x 4mm TQFN ELECTRICAL CHARACTERISTICS (continued) (DC, LX_ unconnected 0V GND PV13 = PV2 = SYS -40°C to +85°C, capacitors as ...
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PMIC with Integrated Chargers and Smart Power Selector in a 4mm x 4mm TQFN (Circuit of Figure +25°C, unless otherwise noted QUIESCENT CURRENT vs. DC VOLTAGE (CHARGER ENABLED) 1.2 1.0 RISING 0.8 0.6 FALLING 0.4 ...
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... AC-TO-DC ADAPTER CONNECT MAX8819A toc10 5V/div 4.3V 4V 2V/div CHARGING C CHARGING SYS 1A 1A/div NEGATIVE BATTERY CURRENT FLOWS INTO THE 1A/div BATTERY -1A 400µs/div POWER-UP SEQUENCING (MAX8819C) MAX8819A toc12 2V/div 0V 2V/div 0V 2V/div 0V 1ms/div REG1 EFFICIENCY = 3.01V) REG1 1 10 100 1000 LOAD CURRENT (mA) 9 ...
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... OUTPUT CURRENT (mA) REG1 HEAVY-LOAD SWITCHING WAVEFORMS MAX8819A toc18 20mV/div AC-COUPLED 2V/div 0V 200mA/div 0mA 200mA LOAD 400ns/div REG1 LOAD TRANSIENT (V = 3V) OUT MAX8819A toc20 300mA 100mA/div 30mA 30mA 100mV/div 3V DC OFFSET 200µs/div ...
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... REG3 100 0 100 LOAD CURRENT (mA) REG3 LIGHT-LOAD SWITCHING WAVEFORMS MAX8819A toc25 20mV/div AC-COUPLED 2V/div 0V 100mA/div 0mA 20mA LOAD 2µs/div REG3 LOAD TRANSIENT MAX8819A toc27 320mA 100mA/div 30mA 30mA 100mV/div 1.2V DC OFFSET 200µs/div 1000 11 ...
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... BOOST LED 25mA LED 60 6 LEDS INDUCTOR: TOKO 1096AS-100M 55 DIODE: NXP PMEG3005EB 50 25 2.5 3.0 3.5 4.0 4.5 SYS VOLTAGE (V) MAX8819A toc33 500 2V/div 450 400 350 10V/div 300 0V 250 200 150 10mA/div 100 0mA LED EFFICIENCY vs. LED CURRENT (6 LEDS) 100 ...
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... Typical Operating Characteristics (continued) 0.750 0.745 0.740 0.735 0.730 FUNCTION is limited to 4.35V (MAX8819A/MAX8819C) or 5.3V SYS ) exceeds the input current limit, V SYS , allowing both the external power source and the battery to service SYS. SYS is BAT MINIMUM LED CURRENT vs. TEMPERATURE -40 - ...
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PMIC with Integrated Chargers and Smart Power Selector in a 4mm x 4mm TQFN PIN NAME Charge Rate Select Input. Connect a resistor from CISET to GND (R 14 CISET current limit, prequalification-charge current limit, and top-off threshold. Active-Low, Open-Drain ...
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... DC power input, Li+/Li-Poly battery charger, three step- down converters, and one step-up converter for powering ______________________________________________________________________________________ Li+/Li-Poly SMART BATTERY POWER CHARGER AND SELECTOR SYSTEM LOAD SWITCH GLITCH FILTER BIAS MAX8819A MAX8819B MAX8819C PV13 EN REG1 STEP-DOWN DC-DC PWM REG1/RESET 87% FALLING 50us BLANKING 92% RISING ...
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... This linear regulator prevents the SYS voltage from exceeding ), the input lim- 5.3V for the MAX8819B or 4.35V for the MAX8819A/ MAX8819C. As shown in Table 1, DC supports four dif- ferent current limits that are set with the DLIM1 and DLIM2 digital inputs. These current limits are ideally suit- Input Limiter ed for use with AC-to-DC wall adapters and USB power ...
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PMIC with Integrated Chargers and Smart Power Selector in a 4mm x 4mm TQFN PREQUALIFICATION V BATREG V BATPRQ I CHGMAX I PREQUAL I TOPOFF 0 HIGH IMPEDANCE LOW Figure 2. Li+/Li-Poly Charge Profile Figure 2 shows the typical Li+/Li-Poly ...
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PMIC with Integrated Chargers and Smart Power Selector in a 4mm x 4mm TQFN 1. 2000 x CHGMAX R CISET DC = VALID INPUT SUSPENDED DLIM[1: 0mA CHG DLIM[1:2] ≠ 11 CHG = 1 ...
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PMIC with Integrated Chargers and Smart Power Selector in a 4mm x 4mm TQFN • The battery charger is enabled by the processor dri- ving the CEN input high. A valid input must be avail- able at DC. The battery ...
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... REG1 is designed to deliver 400mA for the MAX8819A/ MAX8819B and 550mA for the MAX8819C. REG2 and REG3 are designed to deliver 300mA for the MAX8819A/ MAX8819B and 500mA for the MAX8819C. The PV13 step-down regulator power input must be connected to SYS ...
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... DC bias voltage char- acteristic becomes poor. Due to this characteristic possible for 0805 capacitors to perform well while 0603 capacitors of the same value may not. The MAX8819A/ MAX8819B require a nominal output capacitance of 10µF, however, after their DC bias voltage derating, the output capacitance must be at least 7.5µ ...
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... RISING 100mV HYST. + DIE TEMP - +165° 6.0V RISING 400mV HYST 4.0V RISING 500mV HYST. EN123 EN4 Figure 5a. MAX8819A/MAX8819B Enable/Disable Logic The peak-to-peak inductor ripple current during PWM operation is calculated as follows: − OUT SYS = I − × × SYS ...
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PMIC with Integrated Chargers and Smart Power Selector in a 4mm x 4mm TQFN SYS + - 2.5V RISING 100mV HYST. + DIE TEMP - +165° 6.0V RISING 400mV HYST 4.0V RISING 500mV HYST. EN123 ...
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... SYS D SS4 t SS_CHG enable/disable logic. Figure 6 shows an example of enable and disable waveforms for the MAX8819A/ MAX8819B. Figure 6 notes: 1) The device is off with no external power applied to DC. The system voltage (V tery voltage ( external supply is applied to DC that causes the step-down converter to power up after the DC-to- SYS soft-start time (t valid and DLIM[1:2] ≠ ...
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PMIC with Integrated Chargers and Smart Power Selector in a 4mm x 4mm TQFN NOTES SYS V BAT t SS-D-S V EN123 V OUT3 V OUT2 V OUT1 V RST1 V EN4 V OUT4 V ...
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... RST1 goes low to reset the µP. Step-Up Converter (REG4) The step-up converter (REG4) operates by regulating the voltage at FB4 to 0.5V. REG4 operates from the system voltage (V ); this voltage can vary from 2.6V to SYS 4.35V (MAX8819A/MAX8819C) or 5.3V (MAX8819B). The STEP EN4 t HI_INIT > ...
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PMIC with Integrated Chargers and Smart Power Selector in a 4mm x 4mm TQFN EN4 enables REG4, disables REG4, and adjusts the volt- age on FB4 in 32 linear steps. If current adjustment is not required, EN4 acts as a ...
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PMIC with Integrated Chargers and Smart Power Selector in a 4mm x 4mm TQFN OUT_ R T FB_ R B Figure 9. Dynamic Output Voltage Control current is first reduced by lowering charge current. If the junction temperature still reaches ...
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... PCB Layout and Routing Good printed circuit board (PCB) layout is necessary to achieve optimal performance. Refer to the MAX8819A Evaluation Kit for Maxim’s recommended layout. Use the following guidelines for the best results: • The LX_ rapidly switches between PV_ and PG_. ...