AAT2557 AnalogicTech, AAT2557 Datasheet

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... General Description The AAT2557 is a fully integrated 500mA battery charger and a 300mA low dropout (LDO) linear regulator. The input voltage range 6.5V for the battery charger and 2.7V to 5.5V for the linear regulator, making it ideal for applications operating with single-cell lithium-ion/polymer batteries. The battery charger is a complete constant cur- rent/constant voltage linear charger ...

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... Linear regulator input voltage. Connect a 1µF or greater capacitor from this pin to ground. Pin Configuration 2 500mA Battery Charger and 300mA LDO Regulator for Portable Systems TSOPJW-14 (Top View) ENLDO GND 1 14 GND GND 2 13 BYP GND 3 12 EN_BAT INLDO 4 11 ISET OUTLDO 5 10 BAT STAT 6 9 ADP GND 7 8 AAT2557 2557.2007.06.1.0 ...

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... Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at condi- tions other than the operating conditions specified is not implied. Only one Absolute Maximum Rating should be applied at any one time. 2. Mounted on an FR4 board. 2557.2007.06.1.0 500mA Battery Charger and 300mA LDO Regulator for Portable Systems 1 2 AAT2557 Value Units 6.0 V -0.3 to 7.5 V -0 ...

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... V Enable Threshold Low EN(L) V Enable Threshold High EN(H) I Enable Input Current EN 1. The AAT2557 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correlation with statistical process controls defined when OUT OUT 3. For V < ...

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... Charge Termination Threshold Current TERM CHG 1. The AAT2557 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correlation with statistical process controls. 2557.2007.06.1.0 500mA Battery Charger and 300mA LDO Regulator for Portable Systems ...

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... Constant Charging Current vs. Temperature 210 208 205 203 200 198 195 193 190 6.5 5.75 6 6.25 -50 AAT2557 (V = 5V) ADP R = 3.24kΩ SET R = 5.36kΩ SET R = 8.06kΩ SET R = 16.2kΩ 31.6kΩ SET SET 2.9 3.1 3.3 3.5 3.7 3.9 V (V) BAT End of Charge Voltage Regulation vs. Temperature = 8.06kΩ ...

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... Sleep Mode Current vs. Supply Voltage 800 700 600 500 400 300 200 100 100 4 AAT2557 vs. Temperature = 8.06kΩ Ω SET - Temperature (°C) Preconditioning Charge Current vs. Supply Voltage R = 3.24kΩ SET R = 5.36kΩ SET R = 8.06kΩ ...

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... V vs. Supply Voltage EN(H) = 8.06kΩ Ω SET 1.2 1.1 -40°C 1 0.9 25°C 0.8 0.7 4 4.25 4.5 4.75 5 5.25 5.5 V (V) ADP 8 500mA Battery Charger and 300mA LDO Regulator for Portable Systems 1.1 1 0.9 0.8 85°C 0.7 0.6 5.75 6 6.25 6.5 4 AAT2557 V vs. Supply Voltage EN(L) = 8.06kΩ Ω SET -40°C 25°C 85°C 4.25 4.5 4.75 5 5.25 5.5 5. (V) ADP 2557.2007.06.1.0 6.25 6.5 ...

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... Ground Current vs. Input Voltage 25°C I =0mA 30 OUT 200 250 300 2 1.203 1.202 1.201 1.200 1.199 1.198 1.197 1.196 -40 -30 -20 -10 AAT2557 Dropout Characteristics = 0mA I = 300mA OUT I = 150mA OUT I = 100mA OUT I = 50mA OUT = 10mA 2.8 2.9 3.0 3.1 3.2 Input Voltage (V) I =300mA OUT I =150mA OUT ...

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... Time (5µs/div) Line Transient Response OUT 0 Time (100µs/div) Load Transient Response 300mA 3.0 2.9 2.8 V OUT 2.7 100 0 I OUT Time (10µs/div) AAT2557 Present 3.00 2.99 2. 2.8V) OUT 400 300 200 100 0 2557.2007.06.1.0 ...

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... Typical Characteristics – LDO Regulator V and V EN(L) EN(H) 1.250 1.225 1.200 V 1.175 EN(H) 1.150 1.125 V 1.100 EN(L) 1.075 1.050 2.5 3.0 3.5 4.0 Input Voltage (V) 2557.2007.06.1.0 500mA Battery Charger and 300mA LDO Regulator for Portable Systems vs 4.5 5.0 5.5 AAT2557 11 ...

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... STAT Temperature Protection INLDO OUTLDO Functional Description The AAT2557 is a high performance power man- agement IC comprised of a lithium-ion/polymer battery charger and a linear regulator. The linear regulator is designed for high-speed turn-on, fast transient response, good power supply ripple rejection, and low noise. ...

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... INLDO to keep the LDO regulator in a continuously on state. Under-Voltage Lockout The AAT2557 has internal circuits for UVLO and power on reset features. If the ADP supply voltage drops below the UVLO threshold, the battery charger will suspend charging and shut down. ...

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... EN pin is recycled; or the charging source is reconnected. In all cases, the charger will mon- itor all parameters and resume charging in the most appropriate mode. Constant Current Charge Phase Phase I = Max CC AAT2557 . When BAT , the battery charg- BAT threshold; the RCH Constant Voltage Charge Phase 2557 ...

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... Monitoring OV Preconditioning Yes Test V > V MIN BAT No Current Phase Test Yes Yes V > V BAT_EOC BAT No Voltage Phase Test Yes I > I BAT TERM No Charge Completed AAT2557 Power On Reset Charge Control Preconditioning (Trickle Charge) Constant Current Charge Mode Constant Voltage Charge Mode 15 ...

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... Figure 2: Constant Charging Current vs. Set Resistor Values. Charge Status Output The AAT2557 provides battery charge status via a status pin. This pin is internally connected channel open drain MOSFET, which can be used to drive an external LED. The status pin can indicate several conditions, as shown in Table 2. ...

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... Note: Red LED forward voltage (V 2.0V @ 2mA. Thermal Considerations The AAT2557 is offered in a TSOPJW-14 package which can provide up to 625mW of power dissipation when it is properly bonded to a printed circuit board and has a maximum thermal resistance of 160°C/W. Many considerations should be taken into account ...

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... BAT pin to maintain circuit stability. This value should be increased to 10µF or more if the battery connection is made any distance from the charger output. If the AAT2557 used in applications where the battery can be removed from the charger, such as with desktop charging cradles, an output capacitor greater than 10µ ...

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... Considerations For the best results recommended to physi- cally place the battery pack as close as possible to the AAT2557 BAT pin. To minimize voltage drops on the PCB, keep the high current carrying traces adequately wide. The input capacitors should con- nect as closely as possible to ADP and INLDO. ...

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... GRM188R60J225KE19 Murata GRM188R61A105KA61 Murata GRM185R60J105KE26 Murata GRM188F51H103ZA01 Murata GRM155F51H103ZA01 20 500mA Battery Charger and 300mA LDO Regulator for Portable Systems Value (µF) 10 4.7 2.2 2.2 1.0 1.0 0.01 0.01 Table 3: Surface Mount Capacitors. AAT2557 Voltage Temp. Case Rating Co. Size 10 X5R 0805 6.3 X5R 0603 10 X5R 0603 6.3 X5R 0603 10 X5R 0603 6.3 ...

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... Code 1.2 E 1.5 G 1.8 I 1.9 Y 2.5 N 2.6 O 2.7 P 2.8 Q 2.85 R 2.9 S 3.0 T 3 XYY = assembly and date code. 2. Sample stock is generally held on part numbers listed in BOLD. 2557.2007.06.1.0 500mA Battery Charger and 300mA LDO Regulator for Portable Systems Marking 1 Part Number (Tape and Reel) VKXYY AAT2557 2 AAT2557ITO-CT-T1 21 ...

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... All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders. Advanced Analogic Technologies, Inc. 830 E. Arques Avenue, Sunnyvale, CA 94085 Phone (408) 737-4600 Fax (408) 737-4611 22 500mA Battery Charger and 300mA LDO Regulator for Portable Systems TSOPJW-14 7° NOM 4° ± 4° + 0.05 0.05 - 0.04 AAT2557 0.04 REF 0.45 ± 0.15 2.75 ± 0.25 2557.2007.06.1.0 ...