TCA62724FMG TOSHIBA | Alldatasheet

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Technical content

(Ver04)2005-11-10 0 TENTATIVE TOSHIBA CMOS INTEGRATED CIRCIUTS SILICON MONOLITHIC TCA62753FUG Charge Pump type DC/DC Converter for White LED Driver TOSHIBA MICROELECTRONICS CORP. APPLICATION ENGINEERING GROUP 3 Ver Data Note Charge chek 0.1 2005-08-01 New Miura 0.2 2005-08-10 TSD Miura 0.3 2005-10-17 Pin A ssignment Miura 0.4 2005-11-10 Electrical Characteristics Miura

(Ver04)2005-11-10 1 TENTATIVE TOSHIBA CMOS INTEGRATED CIRCIUTS SILICON MONOLITHIC TCA62753FUG Charge Pump type DC/DC Converter for White LED Driver The TCA62753FUG is a charge pump type DC/DC Converter specially designed for constant current driving of White LED. This IC can outputs LED current 100mA or more to 3.0-5.5V input. This IC is especially for driving back light white LEDs in LCD of PDA, Cellular Phone, or Handy Terminal Equipment. This IC is Pb-free product.

Features

ɾInput Voltage : V IN=2.7V to 5.5V ɾOutput Current (VOUT=5V) : 100mA (V IN=3.0V or more) 50mA (V IN=2.7V to 3.0V) ɾSwitching Frequency : 1MHz(Typ.) ɾIntegrated protection circuit : Thermal Shut Down function Output short circuit detection function Output over voltage detection function ɾPackage : SSOP6-P-0.95B Weight: 0.016 g (Typ.)

(Ver04)2005-11-10 2 TENTATIVE Pin Assignment (top view) Explanation of the Terminal No. Symbol Function C- Capacitance connection terminal for charge pump. VIN Power supply terminal. C+ Capacitance connection terminal for charge pump. VOUT Output terminal. GND GND terminal. SHDN Logic input terminal. (input a chip enable signal) SHDN = ”H” → Operation mode, SHDN = ”L” → Shutdown mode Block Diagram VIN SHDN GND VOUT Z Control Circuit VREF Step up Control Circuit VOUT GND VIN SHDN

(Ver04)2005-11-10 3 TENTATIVE Absolute Maximum Ratings (Ta=25°C) Characteristics Symbol Ratings Unit Power supply voltage V IN −0.3 to +6.0 V Input Voltage V SHDN −0.3~+VIN +0.3 *Note1 V Output Voltage V OUT −0.3~+6.0 V 0.41(Device) Power Dissipation P D 0.47(with PCB) *Note2 W 300(Device) Thermal resistance R th (j-a) 260(with PCB) °C/W Operating temperature range Topr −40~+85 °C Storage temperature Tstg −55~+150 °C Maximum junction temperature Tj 150 °C Note2: However, do not exceed 6V. Note3: When every time the ambient temperature gets ov er 25°C with 1°C, the allowable loss must reduce 3.8mW/°C more than maximum rated value. (When on PCB.) Recommended Operating Condition (unless otherwise specified, Ta = −40~85°C) Characteristics Symbol Test Circuit Test Conditions Min. Typ. Max. Unit Power supply voltage V IN - - 2.7 - 5.5 V Capacitance for Charge Pump C - - - 1.0 - mA Capacitance for input C IN - - 1.0 2.2 10 µF Capacitance for output C OUT - - 1.0 2.2 10 µF Electrical Characteristics (unless otherwise specified, VIN = 3.6V, Ta = 25°C) Characteristics Symbol Test Conditions Min. Typ. Max. Unit Power supply voltage V IN - 2.7 - 5.5 V Output Voltage V OUT VIN=2.7~3.0V, IOUT=50mA VIN=3.0~5.0V, IOUT=100mA 4.8 5.0 5.2 V Operating consumption current I IN I OUT=0mA, VSHDN=VIN 8 mA VIN=2.7~3.6V, IOUT=0mA, VSHDN=0V - 0.01 1 Quiescent consumption current I IN VIN=3.6~5.0V, IOUT=0mA, VSHDN=0V - - 2.5 µA SHDN terminal H level input voltage V SHDNH - 1.3 - V IN V SHDN terminal L level input voltage V SHDNL - 0 - 0.3 V ISHDNH V SHDN=VIN -1 - 1 SHDN terminal current ISHDNL V SHDN=0V -1 1 µA Clock Frequency f OSC V SHDN=3.6V - 1 - MHz Short Circuit Current ISC V OUT=GND, VSHDN=3.6V - 250 - mA

(Ver04)2005-11-10 4 TENTATIVE The example of Application Circuit *Output This product outputs 5V(±0.2V) from the terminal V OUT in input voltage VIN=2.7V or more. *Thermal shutdown function The thermal shutdown circuit works when the junction temperature exceeds 150ˆ(standard), and IC stops operating. (This function is not included in the product inspection.) *Output short circuit detection function When the output do short-circuit, IOUT is limited to 250mA(standard). *Output over voltage detection function The output is clamped so that VOUT should not become 6V or more even when the LED load is opened. GND SHDN VIN C- 1 VIN VOUT ON/OFF C=1.0µF CIN=1.0µF COUT=1.0µF VOUT

(Ver04)2005-11-10 5 TENTATIVE Package Dimensions Weight: 0.016 g (Typ.)

(Ver04)2005-11-10 6 TENTATIVE Notes on Contents Block Diagrams Some functional blocks, circuits, or constants may be omitted or simplified in the block diagram for explanatory purposes. Equivalent Circuitry Some parts of the equivalent circuitry may have been omitted or simplified for explanatory purposes. Maximum Ratings The absolute maximum ratings of a semiconductor devi ce are a set of specified parameter values that must not be exceeded during operation, even for an instant. If any of these ratings are exceeded during operat ion, the electrical characteristics of the device may be irreparably altered and the reliability and lif etime of the device can no longer be guaranteed. Moreover, any exceeding of the ratings during oper ation may cause breakdown, damage and/or degradation in other equipment. Applications us ing the device should be designed so that no maximum rating will ever be exceeded under any operating conditions. B e f o r e u s i n g , c r e a t i n g a n d / o r producing designs, refer to and comply with the precautions and conditions set f o r t h i n t h i s d o c u m e n t . Application Examples The application examples provided in this data sheet are provided for reference only. Thorough evaluation and testing should be implemented when desi gning your application's mass production design. In providing these application examples, Toshiba does not grant the use of any industrial property rights. Handling of the IC Ensure that the product is installed correctly to prevent breakdown, damage and/or degradation in the product or equipment. Short circuiting between output and line to ground faults may result in damage to the IC. Please exercise precaution in designing the output line, po wer line and GND line so as to prevent such damage. Be careful to insert the IC correctly. Inserting the IC the wrong way (e.g., wrong direction) may result in d a m a g e t o t h e I C . Please exercise precaution in handling external components as shorting and opening such components may cause an overcurrent, which in turn may result in power overcurrent and/or in damage to the IC. Overcurrent and Thermal Protection Toshiba does not guarantee th at these protection functions will prevent damage to the product. These functions are only intended as a temporary means of preventing output short circuiting and other abnormal c o n d i t i o n s . If the guaranteed operating rang es of this product are exceeded, these protection functions may not function as intended and this product might be damaged due to output short circuiting. The overcurrent protection functi on is intended to protect this product from temporary short circuiting only. Short circuiting that last for a long time may cause excessive stress and damage to this product.

(Ver04)2005-11-10 7 TENTATIVE