RT9161B Preliminary Simple Lithium-Ion Battery Charger General Description Features The RT9161B is a single-cell lithium-ion battery z High Accuracy Charge Voltage: ±1% charger. It includes an on-chip pass transistor for z 6 Available Output Voltages high precision charging. Featuring with ultrahigh z Low 450mV Dropout at 300mA precision (±1%), the RT9161B provides a very z Wide Input Voltage Range effective and low cost solution for charging lithium- z Thermal Shutdown and Current Limit Protection ion battery. z SOT-89 and SOT-223 z Low Ground Current 110µ µA Other features of the RT9161B are current limit and thermal shutdown protection. The output voltage of Applications RT9161B is internally set and ranges from 4.10V to z Li-Ion Battery Charger 4.35V, in 0.05V steps. The RT9161B comes in the z Cellular Phones SOT-89 and SOT-223 packages. z Palmtop Computers z PDAs z Self Charging Battery Packs Ordering Information RT9161B- Package type X : SOT-89 G : SOT-223 Operating temperature range C: Commercial standard Pin Configurations Part Number Pin Configurations TOP VIEW RT9161B- CX 1. GND 2. VIN (TAB) 3. VOUT (Plastic SOT-89) 1 Output voltage 2 3 41 : 4.10V 4A : 4.15V RT9161B- CG 42 : 4.20V (Plastic SOT-223) 4B : 4.25V TOP VIEW 1 2 3 1. GND 2. VIN (TAB) 3. VOUT 43 : 4.30V 4C : 4.35V DS9161B-02 April 2001 www.richtek-ic.com.tw 1 RT9161B Preliminary Absolute Maximum Ratings z Input Voltage -0.3 ~ 14V z Power Dissipation, PD @ TA = 25°C SOT-89 0.5W • Package Thermal Resistance SOT-89, θJC 100°C/W SOT-89, θJA 300°C/W SOT-223, θJC 15°C/W SOT-223, θJA 60°C/W z Operating Junction Temperature Range -40°C ~ 125°C z Storage Temperature Range -65°C ~ 150°C Electrical Characteristics (TA = 25°C, CIN = 1µF, COUT = 10µF, unless otherwise specified) Parameter Input Voltage Range Symbol (1) Test Conditions VIN Output Voltage Accuracy ∆VOUT Min Typ Max Units 4.5 -- 14 V -1 -- +1 % -- 50 150 PPM/°C IL = 1mA, VIN = 5V Output Voltage Temperature (1) Coefficient Line Regulation Load Regulation Current Limit (2) (3) Dropout Voltage (4) Standby Current ∆VLINE IL = 1mA, VIN = 4.5 ~ 12 V -- 2 3 %VOUT ∆VLOAD IL = 1mA ~ 300/500/mA, , VIN = 5V -- 1 30/50 mV ILIMIT VIN = 5V, VOUT = 0V 300 -- 600 mA VDROP IL = 300/500mA -- 450/750 -- mV -- 110 180 µA ISTANDBY IL = 0, VIN = 12V Note: (1) Guaranteed by design. (2) Regulation is measured at constant junction temperature, using pulsed ON time. (3) Current Limit is measured at constant junction temperature, using pulsed ON time. (4) Dropout is measured at constant junction temperature, using pulsed ON time. Function Block Diagram VOUT _ Current Limit Thermal Shutdown + VIN Error Amp 1.2V Reference GND www.richtek-ic.com.tw 2 DS9161B-02 April 2001 RT9161B Preliminary Pin Description Pin Name Pin Function VOUT Output Voltage GND Ground VIN Power Input Typical Application Circuit Regulated or unregulated wall adaptor RT9161B 1N5817 VIN (4.10V ~ 4.35V) ±1% VOUT GND + 1µF VIN (4.8V-12V) D1 1N5817 R1 10K + RT9161BCG VIN VOUT GND C1 10µF/16V + Li-Ion Cell 10µF RT9701 VOUT VIN + VOUT GND CE C2 10µF/6.3V VOUT ± 1% C3 1µF + BT1 Li-Ion Cell D2 BZ×284-B3V3 DS9161B-02 April 2001 www.richtek-ic.com.tw 3 RT9161B Preliminary Package Information D A D1 H B C C1 e e A b Symbol b1 b Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 1.397 1.600 0.055 0.063 b 0.356 0.483 0.014 0.019 B 2.388 2.591 0.094 0.102 b1 0.406 0.533 0.016 0.021 C -- 4.242 -- 0.167 C1 0.787 1.194 0.031 0.047 D 4.394 4.597 0.173 0.181 D1 1.397 1.753 0.055 0.069 e 1.448 1.549 0.057 0.061 H 0.355 0.432 0.014 0.017 3-Lead SOT-89 Surface Mount www.richtek-ic.com.tw 4 DS9161B-02 April 2001 RT9161B Preliminary D D1 B C L e e A H A1 b Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A -- 1.803 -- 0.071 A1 0.020 0.100 0.0008 0.0047 b 0.610 0.787 0.024 0.031 B 3.302 3.708 0.130 0.146 C 6.706 7.290 0.264 0.287 D 6.299 6.706 0.248 0.264 D1 2.896 3.150 0.114 0.124 e 2.261 2.362 0.089 0.093 H 0.229 0.330 0.009 0.013 L 0.914 -- 0.036 -- 3-Lead SOT-223 Plastic Surface Mount DS9161B-02 April 2001 www.richtek-ic.com.tw 5 RT9161B Preliminary RICHTEK TECHNOLOGY CORP. RICHTEK TECHNOLOGY CORP. Headquarter Taipei Office (Marketing) 6F, No. 35, Hsintai Road, Chupei City 8F-1, No. 137, Lane 235, Paochiao Road, Hsintien City Hsinchu, Taiwan, R.O.C. Taipei County, Taiwan, R.O.C. Tel: (8863)5510047 Fax: (8863)5537749 Tel: (8862)89191466 Fax: (8862)89191465 Email: [email protected] www.richtek-ic.com.tw 6 DS9161B-02 April 2001