RT9161B

Preliminary RT9161B Simple Lithium-Ion Battery Charger General Description The RT9161B is a single-cell lithium-ion battery charger. It includes an on-chip pass transistor for high precision charging. Featuring with ultrahigh precision (±1%), the RT9161B provides a very effective and low cost solution for charging lithiumion battery. Other features of the RT9161B are current limit and thermal shutdown protection. The output voltage of RT9161B is internally set and ranges from 4.10V to 4.35V, in 0.05V steps. The RT9161B comes in the SOT-89 and SOT-223 packages. Features High Accuracy Charge Voltage: ±1% 6 Available Output Voltages Low 450mV Dropout at 300mA Wide Input Voltage Range Thermal Shutdown and Current Limit Protection SOT-89 and SOT-223 Low Ground Current 110µA Applications Li-Ion Battery Charger Cellular Phones Palmtop Computers PDAs Self Charging Battery Packs Ordering Information RT9161BPackage type X : SOT-89 G : SOT-223 Operating temperature range C: Commercial standard Output voltage 41 : 4.10V 4A : 4.15V 42 : 4.20V 4B : 4.25V 43 : 4.30V 4C : 4.35V Pin Configurations Part Number RT9161BCX 1 2 3 Pin Configurations TOP VIEW 1. GND 2. VIN (TAB) 3. VOUT TOP VIEW 1. GND 2. VIN (TAB) 3. VOUT (Plastic SOT-89) RT9161B- CG 1 2 3 (Plastic SOT-223) DS9161B-02 April 2001 www.richtek-ic.com.tw 1 RT9161B Absolute Maximum Ratings Input Voltage Power Dissipation, PD @ TA = 25°C SOT-89 • Package Thermal Resistance SOT-89, θJC SOT-89, θJA SOT-223, θJC SOT-223, θJA Operating Junction Temperature Range Storage Temperature Range Preliminary -0.3 ~ 14V 0.5W 100°C/W 300°C/W 15°C/W 60°C/W -40°C ~ 125°C -65°C ~ 150°C Electrical Characteristics (TA = 25°C, CIN = 1µF, COUT = 10µF, unless otherwise specified) Parameter Input Voltage Range (1) Symbol VIN ∆VOUT Test Conditions Min 4.5 Typ --50 2 1 -450/750 110 Max 14 +1 150 3 30/50 600 -180 Units V % PPM/°C %VOUT mV mA mV µA Output Voltage Accuracy Output Voltage Temperature (1) Coefficient Line Regulation Load Regulation Current Limit (3) (4) (2) IL = 1mA, VIN = 5V -1 -- ∆VLINE ∆VLOAD ILIMIT VDROP IL = 1mA, VIN = 4.5 ~ 12 V IL = 1mA ~ 300/500/mA, , VIN = 5V VIN = 5V, VOUT = 0V IL = 300/500mA --300 --- Dropout Voltage Standby Current Note: ISTANDBY IL = 0, VIN = 12V (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 VIN Error Amp VOUT Current Limit Thermal Shutdown + www.richtek-ic.com.tw 2 _ 1.2V Reference GND DS9161B-02 April 2001 Preliminary Pin Description Pin Name VOUT GND VIN Pin Function Output Voltage Ground Power Input RT9161B Typical Application Circuit RT9161B VIN GND 1µF 10 µF VOUT + + Li-Ion Cell Regulated or unregulated wall adaptor 1N5817 (4.10V ~ 4.35V) ±1% VIN (4.8V-12V) D1 1N5817 R1 10K + RT9161BCG VIN VOUT GND C1 10 µF/16V RT9701 VOUT VIN + C2 10 µF/6.3V VOUT GND CE C3 1µF + VOUT ± 1 % BT1 Li-Ion Cell D2 BZ×284-B3V3 DS9161B-02 April 2001 www.richtek-ic.com.tw 3 RT9161B Package Information D D1 Preliminary A H C B C1 e e A b b1 b Symbol A b B b1 C C1 D D1 e H Dimensions In Millimeters Min 1.397 0.356 2.388 0.406 -0.787 4.394 1.397 1.448 0.355 Max 1.600 0.483 2.591 0.533 4.242 1.194 4.597 1.753 1.549 0.432 Dimensions In Inches Min 0.055 0.014 0.094 0.016 -0.031 0.173 0.055 0.057 0.014 Max 0.063 0.019 0.102 0.021 0.167 0.047 0.181 0.069 0.061 0.017 3-Lead SOT-89 Surface Mount www.richtek-ic.com.tw DS9161B-02 April 2001 4 Preliminary RT9161B D D1 C B L e e A b A1 H Symbol A A1 b B C D D1 e H L Dimensions In Millimeters Min -0.020 0.610 3.302 6.706 6.299 2.896 2.261 0.229 0.914 Max 1.803 0.100 0.787 3.708 7.290 6.706 3.150 2.362 0.330 -- Dimensions In Inches Min -0.0008 0.024 0.130 0.264 0.248 0.114 0.089 0.009 0.036 Max 0.071 0.0047 0.031 0.146 0.287 0.264 0.124 0.093 0.013 -- 3-Lead SOT-223 Plastic Surface Mount DS9161B-02 April 2001 www.richtek-ic.com.tw 5 RT9161B Preliminary RICHTEK TECHNOLOGY CORP. Headquarter 6F, No. 35, Hsintai Road, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5510047 Fax: (8863)5537749 RICHTEK TECHNOLOGY CORP. Taipei Office (Marketing) 8F-1, No. 137, Lane 235, Paochiao Road, Hsintien City Taipei County, Taiwan, R.O.C. Tel: (8862)89191466 Fax: (8862)89191465 Email: marketing@richtek-ic.com.tw www.richtek-ic.com.tw DS9161B-02 April 2001 6