AP6714

AP6714

Document overview

• Manufacturer or author: Diodes Incorporated
• PDF pages: 11

Technical content

Features

• 94% Efficient Step-Up DC to DC Converter
• Wide Input Range 0.9V to 5.5V
• 1.8V to 5.5V Adjustable Output Voltage
• 1.8MHz Operating Frequency
• Current Mode Operation for faster transient response and better loop stability
• 1µA Shutdown Mode
• Suitable with Low ESR Ceramic Capacitors (MLCC)
• Over Current Protection
• Over Temperature Protection
• MSOP-10L: Available in “Green” Molding Compound (No Br, Sb)
• Lead Free Finish/ RoHS Compliant (Note 1)

Applications

• All One-cell, Two-cell, Three cell, Alkaline, NiCd or NiMh or Single-cell Li+ Battery Powered Devices.
• Cell Phones
• Digital Cameras
• MP3 Players
• PDAs Typical Application Circuit (Note 2) VOUT VIN L1 2.7uH 10u 470p 0.1u 10u AP6714 10VCC EN CC FB REF PGND SGND OCP LX OUT Rcc Rocp 0.1 Ohm

1 MOhm

27 KOhm

R R TOP BOTTOM CC INOUT Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied, see EU Directive 2002/95/EC Annex Notes. 2. Recommended minimum R BOTTOM: 100 KΩ.

1.8MHz SYNCHRONOUS BOOST CONVERTER AP6714 Document number: DS31490 Rev. 5 - 2 2 of 11 www.diodes.com April 2011 © Diodes Incorporated Pin Descriptions Pin Name Pin # Description VCC 1 Power Input pin EN 2 Enable Channel CC 3 Channel Compensation Pin FB 4 Channel Feedback Pin REF 5 Internal Reference Voltage SGND 6 Signal Ground PGND 7 Power Ground OCP 8 Over Current Protection LX 9 SW Pin OUT 10 Boost Output Pin Functional Block Diagram EN FB REF Error Amplifier SGND BANDGAP Vref=1.23V Soft- Start Thermal - shutdown Bias Oscillator Ramp PWM Comparator Schmitt-Trigger PWM Control Anti - Through Logic LX PGND OCP Current - Limit - 0.16V OCP Comparator ZCR Comparator + Power - Good CC VCC OUT Absolute Maximum Ratings Symbol Parameter Rating Unit ESD HBM Human Body Model ESD Protection 3 KV ESD MM Machine Model ESD Protection 250 V OUT, VCC, EN, FB, OCP to GND -0.3 to +6.5 V LX to GND -0.3 to (OUT + 0.3) V ILX LX Current 1.6 A REF, CC to GND -0.3 to (VCC + 0.3) V PD Continuous Power Dissipation (T A = 25oC) 850 mW TJ Operating Junction Temperature Range -40 to +125 oC TST Storage Temperature Range -65 to +150 oC

1.8MHz SYNCHRONOUS BOOST CONVERTER AP6714 Document number: DS31490 Rev. 5 - 2 3 of 11 www.diodes.com April 2011 © Diodes Incorporated Recommended Operating Conditions Symbol Parameter Rating Unit TA Operating Ambient Temperature Range -40 to +85 oC VIN Supply Voltage at V IN (Note 3) 0.9 to 5.5 V VOUT Output Voltage 1.8 to 5.5 V Notes: 3. The AP6714 is powered by step-up output. An internal low-voltage startup oscillator dr ives the starting at approximately 0.9V and the main control will take over as soon as output is reached. AP6714 operation could be kept in low input voltage and output curren t is just limited. Electrical Characteristics (VCC = 3V, TA = 25°C, unless otherwise specified) Symbol Parameter Conditions Min Typ. Max Unit GENERAL ISTB Standby Current VCC = 3.6V ,VEN = 0V - 0.5 1 µA ICC Supply Current VCC = EN = 3.6V, FB = 1.5V - 150 300 µA REFERENCE VREF Reference Output Voltage 1.205 1.23 1.255 V ΔVREF/ΔT Tempco of Reference -40 oC ≤ T ≤ 125 oC 30 50 ppm/ oC VREF(LOAD) Reference Load Regulation 10mA < ILOAD < 200mA - 4.5 10 mV VREF(LINE) Reference Line Regulation 2.8 < VCC < 5.5V - 1.3 5 mV OSCILLATOR FOSC OSC Frequency 1400 1800 2200 KHz STEP-UP DC-TO-DC ΔVOUT/ΔT Tempco of Output Voltage IOUT = 10mA, -40 oC ≤ T≤ 85 oC 50 100 ppm/ oC FB Input Leakage Current FB = 1.25V -100 0.01 +100 nA Duty Step-Up Maximum Duty Cycle FB = 0V 80 85 90 % IOUT OUT Leakage Current VLX = 0V, OUT = 5V - 1 5 µA ILXL LX Leakage Current VLX = OUT = 5V - 2 5 µA RDS(ON) Switch On-Resistance N channel, Vcc = 5V - 200 - mΩ P channel, Vcc = 5V - 300 - ILM N-Channel Current Limit VIN = 1.5V (Note 4) 1.2 1.4 1.6 A THERMAL-SHUTDOWN PROTECTION Thermal Shutdown - 150 - oC Thermal Hysteresis - 40 - oC LOGIC INPUTS EN Input Low Level 1.5V < VCC < 5.5V - - 0.4 V EN Input High Level 1.5V < VCC < 5.5V 0.8 - - V OVER CURRENT PROTECTION VOCP Over Current Protection Voltage ROCP = 0.1Ω - 0.16 - V THERMAL RESISTANCE θJA Thermal Resistance Junction-to- Ambient MSOP-10L (Note 5) 161 oC/W θJC Thermal Resistance Junction-to-Case MSOP-10L (Note 5) 43 oC/W Notes: 4. The step-up current limit in startup refers to the LX switch current limit, no t the output current limit. 5. Test condition for MSOP-10L: Device mounted on 2oz copper, minimum recommended pad layout on top & bottom layer with thermal vias, double sided FR-4 PCB.

1.8MHz SYNCHRONOUS BOOST CONVERTER AP6714 Document number: DS31490 Rev. 5 - 2 4 of 11 www.diodes.com April 2011 © Diodes Incorporated Typical Operating Characteristics 125 150 175 200 225 250 275 300 INPUT VOLTAGE (V) Fig. 1 Supply Current vs. Input Voltage 100 SUPPLY CURRENT ( A)μ -40 -25 25 85 125 TEMPERATURE ( C) Fig. 2 Supply Current vs. Temperature 125 150 175 200 225 250 275 300 100 SUPPLY CURRENT ( A)μ V = 2.4VIN V = 3 . 6 VIN 0.2 0.4 0.6 0.8 1.2 1.4 -40 25 105 125 TEMPERATURE ( C) Fig. 3 Stand-by Current vs. Temperature STAND-BY CURRENT ( A)μ V = 1.5VIN V = 3.0VIN 1700 1750 1800 1850 1900 1950 2000 2050 -40 -25 25 85 105 125 TEMPERATURE ( C) Fig. 4 Frequency vs. Temperature FREQUENCY (KHz) -40 -25 25 85 105 125 TEMPERATURE ( C) Fig. 5 Max Duty vs. Temperature MAX DUTY (%) 1.19 1.2 1.21 1.22 1.23 1.24 1.25 1.26 -40 -25 25 105 125 V ( V )REF TEMPERATURE ( C) Fig. 6 V vs. Temperature REF V = 1.8VIN V = 3 . 6 VIN V = 5.5V I = 10mA OUT OUT

1.8MHz SYNCHRONOUS BOOST CONVERTER AP6714 Document number: DS31490 Rev. 5 - 2 5 of 11 www.diodes.com April 2011 © Diodes Incorporated Typical Operating Characteristics (cont.) 200 400 600 1000 1200 1400 INPUT VOLTAGE (V) Fig. 7 Input Voltage vs. Current Limit I I OUT SW 800 CURRENT LIMIT (mA) V = 3 . 3 V ROCP = 0.1 OUT Ω 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 INPUT VOLTAGE (V) Fig. 8 Input Voltage vs. Max Start Up Current MAX START UP CURRENT (mA) I I OUT SW V = 3 . 3 VOUT 100 10 30 50 80 100 150 200 250 OUTPUT CURRENT (mA) Fig. 9 EFFI. vs. Output Current EFFI. (%) V = 1.3VIN V = 2 . 5 VOUT 10 50 100 150 200 300 100 OUTPUT CURRENT (mA) Fig. 10 EFFI. vs. Output Current EFFI. (%) V = 1 . 5 VIN V = 2.5VOUT 10 30 50 80 100 150 200 100 OUTPUT CURRENT (mA) Fig. 11 EFFI. vs. Output Current EFFI. (%) V = 1.3VIN V = 3.3VOUT 100 OUTPUT CURRENT (mA) Fig. 12 EFFI. vs. Output Current EFFI. (%) 10 50 100 150 200 300 V = 1 . 5 VIN V = 3.3VOUT

1.8MHz SYNCHRONOUS BOOST CONVERTER AP6714 Document number: DS31490 Rev. 5 - 2 6 of 11 www.diodes.com April 2011 © Diodes Incorporated Typical Operating Characteristics (cont.) V = 2 . 0 V V = 3 . 3 V IN OUT 50 100 150 200 300 400 500 OUTPUT CURRENT (mA) Fig. 13 EFFI. vs. Output Current 100EFFI. (%) 50 100 150 200 300 400 500 OUTPUT CURRENT (mA) Fig. 14 EFFI. vs. Output Current 100EFFI. (%) V = 2.5V V = 3.3V IN OUT 50 100 150 200 300 400 500 OUTPUT CURRENT (mA) Fig. 15 EFFI. vs. Output Current 100EFFI. (%) V = 3.0V V = 3.3V IN OUT 50 100 150 200 300 400 500 OUTPUT CURRENT (mA) Fig. 16 EFFI. vs. Output Current 100EFFI. (%) V = 3.6V V = 5.0V IN OUT 50 100 150 200 300 400 500 OUTPUT CURRENT (mA) Fig. 17 EFFI. vs. Output Current 100EFFI. (%) V = 4 . 2 V V = 5.0V IN OUT 50 100 150 200 300 400 500 OUTPUT CURRENT (mA) Fig. 18 EFFI. vs. Output Current 100EFFI. (%) V = 4.5V V = 5.0V IN OUT

1.8MHz SYNCHRONOUS BOOST CONVERTER AP6714 Document number: DS31490 Rev. 5 - 2 7 of 11 www.diodes.com April 2011 © Diodes Incorporated Typical Operating Characteristics (cont.) Fig. 19 Switching Current vs. Output Ripple Fig. 20 Switching Current vs. Output Ripple Fig. 21 Load Transient Response Fig. 22 Load Transient Response Fig. 23 Load Transient Response Fig. 24 Load Transient Response

1.8MHz SYNCHRONOUS BOOST CONVERTER AP6714 Document number: DS31490 Rev. 5 - 2 8 of 11 www.diodes.com April 2011 © Diodes Incorporated Typical Operating Characteristics (cont.) Fig. 25 Load Transient Response Fig. 26 Load Transient Response Fig. 27 Power On Wave Fig. 28 Power On Wave

1.8MHz SYNCHRONOUS BOOST CONVERTER AP6714 Document number: DS31490 Rev. 5 - 2 9 of 11 www.diodes.com April 2011 © Diodes Incorporated

Application Information

The input filter capacitor reduces peak currents drawn from the input source and reduces input switching noise. In most applications a 10µF is recommended. Output Capacitor Selection The major parameter necessary to define the output capacitor is the maximum allowed output voltage ripple of the converter. This ripple os determined by two parameters of the capacitor, the capacitance and the ESR (Equivalent Series Resistance). It is possible to calculate the minimum capacitance needed for the defined ripple, supposing that ESR is zero, by using Equation below: OUTV V f )INVOUTV (OUTI MINC × Δ × − ×= where f =the switching frequency △V =the maximum allowed ripple Shutdown Mode The AP6714 converter will stop switching by setting EN pin Low, and is turned on by pulli ng it high. If this feature is not used, the EN pin should be tied to VCC pin to keep the regulator output on all t he time. To ensure proper operation, the signal source used to drive the EN pin must be able to swing above and below the specified turn-on/off voltage thresholds listed in the Electrical Characteristics section under V IL and VIH. Inductor Selection The high frequency operation of the AP6714 allows the use of small surface mount inductors. The minimum inductance value is limited by the following constraints: H ) MAX ( OUTV) Ripple ( SWI f )) MIN ( INV) MAX ( OUTV () MIN ( INV L ×× Where f= Operating frequency (Hz) ISW(Ripple)= Allowable Inductor Current Ripple (A) VIN(MIN)= Minimum Input Voltage (V) VOUT(MAX)= Maximum Output Voltage (V) Over Current Protection (OCP) A resistor is required to connect PGND pin and OCP pin to prevent an overload occurs at the output. The output voltage will drop and duty cycle will be reduced if the OCP exceeds 0.16V. When R OCP is 0.1 Ω, the maximum switching current to operate normally is 1.6A (0.16V/0.1Ω). However, the actual switching current is related to duty ratio. By the way, larger R OCP is recommended when V OUT − V IN ≤ 0.5V since the dropped output voltage is smaller then regular case while an overload condition exists. Internal circuit of OCP function Thermal Information The maximum recommended junction temperature (TJ) of AP6714 is 125°C. The thermal resistance of the 10-pin MSOP10 package is R θJA = 161°C/W, if the Power PAD is soldered. Specified regulat or operation is assured to an ambient temperature T A of 45°C. Therefore, the maximum power dissipation is about 500mW. More power can be dissipated if the maximum ambient temperature of the application is lower. JAR AT) MAX ( JT ) MAX ( DP θ Designing a PC Board Good PC board layout is im portant to achieve optimal performance from AP6714. Poor design can cause excessive conducted and/or radiated noise. Conductors carrying discontinuous currents and any high-current path should be made as short and wide as possible. A separate low-noise ground plane contain-ing the reference and signal grounds should connect to the power-ground plane at only one point to minimize the effects of power-ground curr ents. Typically, the ground planes are best joined right at the IC. Keep the voltage- feedback network very close to the IC, preferably within 0.2in (5mm) of the FB pin. Nodes with high dV/dt (switching nodes) should be kept as small as possible and should be routed away from high-impedance nodes such as FB.

1.8MHz SYNCHRONOUS BOOST CONVERTER AP6714 Document number: DS31490 Rev. 5 - 2 10 of 11 www.diodes.com April 2011 © Diodes Incorporated

Ordering Information

M10 : MSOP-10L AP 6714 M10 G - 13 Packing 13 : Tape & Reel Green G : Green Device Package Code Packaging (Note 6) 13” Tape and Reel Quantity Part Number Suffix AP6714M10G-13 M10 MSOP-10L 2500/Tape & Reel -13 Notes: 6. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes .com/datasheets/ap02001.pdf. Marking Information 6714 ( Top View ) Y W X Part Number Logo A~Z : Green 9876 1 24 5 MSOP-10L Y : Year : 0~9 a~z : 27~52 week; z represents W : Week : A~Z : 1~26 week; 52 and 53 week Package Outline Dimensions (All Dimensions in mm) MSOP-10L 2.95/3.05 4.8/5.0 0.17/0.27 0.10 0.1/0.2 0.4/0.7 0.25 Gauge plane 0°/8° "A" DETAIL "A" 1.10Max. Seting plane0.5Typ. C C 10x-0.30 8x-0.50 10x-1.4 Land Pattern Recommendation (Unit:mm) 4.4

1.8MHz SYNCHRONOUS BOOST CONVERTER AP6714 Document number: DS31490 Rev. 5 - 2 11 of 11 www.diodes.com April 2011 © Diodes Incorporated IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or ot her changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products desc ribed herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthoriz ed sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fee s arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support dev ices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2011, Diodes Incorporated www.diodes.com