YB1300 Regulated Charge Pump 5V 100mA Description Features The YB1300 is a switched capacitor DC/DC step up converter that produces a regulated 5V output. The input voltage range is from 2.7V to 5.0V that makes the YB1300 ideally for a single cell Li-Ion battery source. The YB1300 works well for step-up applications without the need for an inductor. The 1MHz switching frequency allows the use of small SMD capacitors. The YB1300 provides thermal protection, short-circuit current limit protection. In order to prevent in-rush current effectively, it provides automatic soft-start. The quiescent current is 30µA without load and its shutdown current is less than 0.1µA. The YB1300 is available in a 6-pin SOT23 package. Switched-Capacitor Step-Up Operation Input Range : 2.7V to 5.0V Output Voltage : 5V Output Current : 2.7V≦VIN＜3.2V, IOUT≦30mA Output Current :3.2V≦VIN＜5V, IOUT≦100mA Shutdown Mode Low Quiescent Current : ~30µA 1MHz Internal Oscillator Thermal Protection Shutdown Output Short-circuit Current Limit Protection Automatic Soft-Start Reduces In-Rush Current SOT23-6 Package Applications Cellular Phones White LED Drivers Smart Card Reader PCMCIA Cards Li-Ion Battery Backup Supplies Typical Application Circuit 5 1-Cell Li-Ion-Battery 3 CIN 2.2uF 2 VIN YB1300 1 VOUT EN CP 6 GND CN 4 R R R R R COUT 2.2uF CPUMP 0.22uF Figure 1. Typical application circuit YB1300 MRev.1.2 WWW.YOBON.COM.TW 1 YB1300 Regulated Charge Pump 5V 100mA Pin Configuration SOT23-6 TOP VIEW VOUT 1 6 CP Y13C GND 2 5 VIN EN 3 4 CN Figure 2. Pin configuration Pin Description Table 1 Pin Name Description 1 VOUT Regulated output voltage. VOUT should be bypassed with a low ESR capacitor for the best performance. 2 GND Ground pin. 3 EN 3V or above will turn on the IC. Below 0.4V will put the chip in the shutdown mode. 4 CN Pumping capacitor negative terminal. 5 VIN Input supply voltage. VIN should be bypassed with a 2.2µF low ESR capacitor. 6 CP Pumping capacitor positive terminal. Ordering Information Order Number Package Type Supplied as Package Marking YB1300 SOT23-6 3000 units Tape & Reel Y13C YB1300 MRev.1.2 WWW.YOBON.COM.TW 2 YB1300 Regulated Charge Pump 5V 100mA Absolute Maximum Ratings Supply Voltage......................................................5.5V Recommended Operating Conditions Output Voltage ......................................................5.5V Input Supply Voltage................................... 2V to 5V Output Short-Circuit Duration ....................Continuous Operating Temperature..................... -40℃ to +85℃ Junction Temperature Range........................... +125℃ Storage Temperature Range ............. -65℃ to +150℃ Lead Temperature............................................ +250℃ Electrical Characteristics At TA=25℃, VIN=3.2V, IOUT=10mA, CIN=COUT=2.2µF, CPUMP=0.22µF, VENABLE=VIN, unless otherwise noted. Table 2 Symbol VIN Function Parameter Test Conditions Input Voltage Min Typ 2.7 Max Units 5.0 V 2.7V≦VIN＜3.2V, IOUT≦30mA 4.7 5.0 5.3 V 3.2V≦VIN＜5V, IOUT≦100mA 4.7 5.0 5.3 V VOUT Output Voltage IOUT Output Current VIN=3V 100 mA ISC Output Current (short-circuit) VIN=3.2V 210 mA 1 MHz FOSC Oscillator Frequency η Efficiency IOUT =20mA, VIN=2.7V 88 % VR Ripple Voltage VIN=3.0V, IOUT =100mA 50 mVpp VIH Enable Control (High) Vin=3.3V to 5.0V 3 VIN V VIL Enable Control (Low) Vin=3.3V to 5.0V -0.2 0.4 V TST Thermal Shutdown Shutdown Temperature ~160 ℃ TRT Thermal Recovery Recovery Temperature ~140 ℃ IQC Supply Current (Quiescent) IOUT =0mA ~30 µA ISD Supply Current (Shutdown) VIN =2.7-5.0V, Enable=0V ~0.0 1 µA Note: YB1300 MRev.1.2 WWW.YOBON.COM.TW 3 YB1300 Regulated Charge Pump 5V 100mA Typical Characteristics At TA=25℃, VIN=3.2V, IOUT=10mA, CIN=COUT=2.2µF, CPUMP=0.22µF, VENABLE=VIN, unless otherwise noted. 220 5 VIN=3.6V Output Voltage (V) 4.8 VIN=4.2V 4.7 VIN=3.4V 4.6 4.5 4.4 VIN=3.0V TA=25℃ CPUMP=0.22µF COUT=2.2µF 4.3 VIN=2.7V 4.2 Short-Circuit Current (mA) 4.9 200 180 160 140 120 100 0 20 40 60 80 Output Current (m A) 100 120 Fig3. Load Regulation 2.5 3 3.5 4 4.5 Supply Voltage (V) 5 5.5 Fig6. Short-Circuit Current vs. Supply Voltage 100 VIN=2.7V 90 VIN=3.0V Efficiency (%) 80 VOUT VIN=3.4V 70 VIN=3.6V 60 CN VIN=4.2V 50 TA=25℃ CPUMP=0.22µF COUT=2.2µF 40 30 1 10 Output Current (m A) 100 Fig7. Output Ripple VIN=3.6V, IOUT=60mA, COUT=2.2µF, CPUMP=0.22µF Fig4. Efficiency 100 TA=25℃ CPUMP=0.22µF COUT=2.2µF Output Ripple (mV) 80 VIN=3.4V 60 VIN=4.2V 40 VIN=3.6V 20 VIN=3.0V VIN=2.7V 0 0 20 40 60 80 Load Current (m A) 100 Fig5. Output Current vs. Output Ripple YB1300 MRev.1.2 120 Fig8. Start-Up Time and In-Rush Current VIN=3.0V, IOUT=0mA, COUT=2.2µF WWW.YOBON.COM.TW 4 YB1300 Regulated Charge Pump 5V 100mA Functional Block Cpump CN 4 CP 6 Short-Circuit Protection VIN Soft-Start Circuit VOUT 5 1 BOOST DRIVER CIN Current Bias Generator EN 3 Chip Enable COUT Boost Feedback & Timing Control Block 1MHz Oscillator Thermal Protection VREF 2 GND Figure 9. Block Diagram Functional Description The YB1300 regulated charge pump provides a regulated 5V output voltage for input voltages between 2.7V and 5V. This is accomplished by a step-up or boost mode of operation. A conversion clock of 50% duty cycle is generated. During the first half cycle, the pumping capacitor CPUMP charges to VIN. During the second half cycle, the voltage on CPUMP is added to VIN, then deliver to VOUT. The output voltage is regulated by skipping clock cycles as necessary. Soft-Start and Short-Circuit Protection Circuitry The YB1300 includes soft-start circuitry to YB1300 MRev.1.2 limit inrush current at turn-on. When starting up, the output capacitor is charged through the charge-pump capacitor with a limited current source. When the output voltage approached to its design value, the soft-start is terminated and normal operation begins. If an overload condition occurs, for example, the output is shorted to ground, the output current is limited by the YB1300 switching technique. Thermal Protection The regulator has thermal shutdown circuitry that protects it from damage caused by high temperature conditions. The thermal protection circuitry shut down WWW.YOBON.COM.TW 5 YB1300 Regulated Charge Pump 5V 100mA the device when the junction temperature reached approximately 160℃, allowing the device to cool. When the junction temperature cools to approximately 140℃, ensure proper regulation under all conditions. Figure 10 and Figure 11 show the recommended layout configuration. the device is automatically reenabled. Continuously running the regulator into thermal shutdown can degrade reliability. Shutdown Mode A control pin on the regulator can be used to place the device into an energy-saving shutdown mode. In this mode, the output is disconnected from the input. Figure 10. Top layer Layout Consideration Due to large transient currents and high switching frequency produced by the YB1300, careful consideration of PCB layout is necessary. In order to minimize both input and output ripple, keep the capacitors as close as possible to the regulator using short, direct circuit traces. A ground plane and short connections to all capacitors will improve performance and YB1300 MRev.1.2 WWW.YOBON.COM.TW Figure 11. Bottom layer 6 YB1300 Regulated Charge Pump 5V 100mA Application Information Vout Gnd Gnd EN Vcc Vcc YB1300 MRev.1.2 Gnd WWW.YOBON.COM.TW 7 YB1300 Regulated Charge Pump 5V 100mA Package Information Notes: 1. Dimension D1 & E1 does not include mold protrusion. 2. Coplanarity of all lead shall be (Before test) 0.1 MAX. from the seating plane. Unless otherwise specified. 3. general physical outline spec is refer to TMC’s final visual inspection spec unless otherwise specified. YB1300 MRev.1.2 WWW.YOBON.COM.TW 8