AP6015 (Not Recommended)
Document overview
- Manufacturer or author: Diodes Incorporated
- PDF pages: 18
Technical content
High Efficiency Step-Down Low Power DC-DC Converter AP6015 Rev. 5-3 1 of 18 January 2020 www.diodes.com © Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN CONTACT US High efficiency synchronous step-down converter with greater than 94% Current Mode Operation for faster transient response and better loop stabilization 2.5V to 5.5V operating input voltage range Adjustable output voltage range from 0.8V to VIN Fixed output voltage options: 1.8V, 2.5V and 3.3V Up to 800mA output current High efficiency over a wide range of load currents PWM operation mode Internal soft-start function Typical quiescent current of 150μA MSOP-10L: Available in “Green” Molding Compound (No Br, Sb) Lead Free Finish/ RoHS Compliant (Note 1) The AP6015 is the first device in a family of low -noise current mode synchronous step -down DC-DC converters. It is ideally suited for systems powered by either a 1-cell Li-ion battery or a 2- to 3-cell NiCd/ NiMH/ Alkaline battery. The AP6015 is a synchronous PWM converter with integrated N- and P-channel power MOSFET switches . Compared to the asynchronous topology, s ynchronous rectification offers the benefits of higher efficiency and reduced component count. The high o perating frequency of 1M Hz allows s mall inductor and capacitor to be used. This results in small pcb area . During shut-down, the standby cur rent drops to 1 μA or less . The AP6015 is available in the 10 -pin MSOP package. It operates over a free-air temperature range of -40oC to 85o C. Mobile Handsets PDAs, Ultra Mobile PCs Portable Media Players, Digital Still/Video Cameras USB-based DSL Modems LAN/WLAN/WPAN/WWAN Modules
Ordering Information
M10 : MSOP-10L AP 6015 - XX M10 G - 13 Packing 13 : Tape & Reel Voltage 18 : 1.8V 25 : 2.5V 33 : 3.3V Blank : Adj Green G : Green Device Package Code Packaging (Note 2) 13” Tape and Reel Quantity Part Number Suffix AP6015-XXM10G-13 M10 MSOP-10L 2500/Tape & Reel -13 Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied, see EU Directive 2002/95/EC Annex Notes. 2. 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. Features General Description
Applications
High Efficiency Step-Down Low Power DC-DC Converter AP6015 Rev. 5-3 2 of 18 July 2020 www.diodes.com © Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN CONTACT US Pin Assignment ( Top View ) MSOP-10L PG FB/Vout NC CC PVCC VCC GND PGND LX EN 5 6 Pin Descriptions Pin Name Pin NO. I/O Description PVCC 1 I Supply voltage input VCC 2 Supply bypass pin. A 1μF coupling capacitor should be connected as close as possible to this pin. GND 3 Ground PG 4 O Power good comparator output. A pull -up resistor should be connected between PG and VO. FB 5 I Feedback pin for the fixed output voltage option. CC 6 I Compensation pin NC 7 NC No connect EN 8 I Enable.Pin, H: Enable. L:shutdown LX 9 I/O Connect the inductor to this pin. PGND 10 Power ground
High Efficiency Step-Down Low Power DC-DC Converter AP6015 Rev. 5-3 3 of 18 July 2020 www.diodes.com © Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN CONTACT US Block Diagram PWM-COM- BANDGAP Osc Vramp Current Protection ER-AMP Buffer PG_COM UVLO Open drainTS Bias LX FBFB PGPG CEEN CCCC PVCC PGND VCC PGNDGND PVCC Vref=0.8V SSSS Notes: 3. The adjustable output voltage version does not use the internal feedback resistor divider. The FB pin is directly connected to the error amplifier. Absolute Maximum Ratings Symbol Parameter Rating Unit ESD HBM Human Body Model ESD Protection 2.5 KV ESD MM Machine Model ESD Protection 300 V PVCC, VCC Supply Voltage -0.3 to +5.5 V Voltages on pins EN, CC, PG, FB, LX -0.3 to VIN +0.3 V TJ(MAX) Maximum Junction Temperature Range +150 oC TST Storage temperature range -65 to +150 oC TOP Operating Junction Temperature Range -40 to +125 oC Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress rat ings only and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods ma affect device reliability.
High Efficiency Step-Down Low Power DC-DC Converter AP6015 Rev. 5-3 4 of 18 July 2020 www.diodes.com © Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN CONTACT US Recommended Operating Conditions (TA :-40~85C) Symbol Parameter Rating Unit TA Operating Ambient Temperature Range -40 to +85 oC VIN Supply Voltage 2.0 to 5.5 V VO Output voltage range for adjustable output voltage version 0.8 to VI V L Inductor (see Note 4) 3.3 μH Ci Input capacitor (see Note 4) 10 μF Co Output capacitor (see Note 4) VO ≥ 1.8V 10 μF Notes: 4. Refer to application section for further information. Electrical Characteristics (TA =25C) Over recommended operating free-air temperature range, VI=3.6V, VO=2.5V, IO=300mA, EN=VIN. (unless otherwise noted) Symbol Parameter Conditions Min Typ. Max Unit Supply current VIN Input Voltage range -20 to 85 oC IO= 0mA to 800mA 2.5 - 5.5 V IO= 0mA to 500mA 2 - 5.5 -40 to 85 oC IO= 0mA to 600mA 2.5 5.5 IO= 0mA to 400mA 2 - - Iccq Operating quiescent current IO= 0mA - 150 - μA ISTBY Standby current EN= GND - 0.1 1 μA Enable VIH EN high-level input voltage VIN≤ 3V 1.5 - - V VIN> 3V 2.5 - - VIL EN low-level input voltage - - 0.7 V IL EN input leakage current EN= GND or VIN - 0.01 0.1 μA V(UVLO) Under-voltage-lockout-threshold 1.2 1.6 1.95 V
High Efficiency Step-Down Low Power DC-DC Converter AP6015 Rev. 5-3 5 of 18 July 2020 www.diodes.com © Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN CONTACT US Electrical Characteristics (Continued) Over recommended operating free-air temperature range, VI=3.6V, VO=2.5V, IO=300 mA, EN=VIN. (unless otherwise noted) Symbol Parameter Conditions Min Typ. Max Unit Power switch and current limit RDS(on) P-channel MOSFET on-resistance VI=VGS=3.6V; I=200mA 200 280 410 mΩ VI=VGS=2V; I=200mA - 480 - P-channel leakage current VDS=5.5V - - 1 μA N-channel MOSFET on-resistance VI=VGS=3.6V; IO=200mA 200 280 410 mΩ VI=VGS=2V; IO=200mA - 500 - N-channel leakage current VDS=5.5V - - 1 μA I(LIM) P-channel current limit 2.5V≤VI≤5.5V 1200 - 1600 mA Power good output (see Note 5) V(PG) Power good threshold Feedback voltage falling 88% VO 92% VO 94% VO V Power good hysteresis 2.5% VO VOL PG output low voltage V(FB)=0.8×VO nominal; I(sink)=10μA - - 0.3 V ILKG PG output leakage current V(FB)=VO nominal 0.01 1 μA Minimum supply voltage for valid power good signal 1.2 - - V Oscillator FS Oscillator frequency 800 1000 1200 KHz Output VO Adjustable output voltage range 0.8 5.5 V VREF Reference voltage 0.784 0.8 0.816 V VO Fixed output voltage (see Note 6) AP6015-Adj VI=2.5V to 5.5V; 0mA ≤ IO ≤ 800mA －3% - 4% V AP6015-1.8V 10mA ≤ IO ≤ 800mA －3% - 3% AP6015-2.5V VI=2.7V to 5.5V; 0mA ≤ IO ≤ 800mA －3% - 4% 10mA ≤ IO ≤ 800mA －3% - 3% AP6015-3.3V VI=3.6V to 5.5V; 0mA ≤ IO ≤ 800mA －3% - 4% 10mA ≤ IO ≤ 800mA －3% - 3% Line regulation VI= VO ＋0.5V (min.2V) to 6.0V; IO=10mA 0.3 %/V Load regulation VI=5.0V; IO=10mA to 800mA 0.8 % η Efficiency VI=5V; VO=3.3V; IO=300mA 94 % VI=3.6V; VO=2.5V; IO=200mA Start-up time IO=0mA, time from active EN to VO 0.4 1 4 ms θJA Thermal Resistance Junction-to-Ambient MSOP-10L (Note 7) 161 oC/W θJC Thermal Resistance Junction-to-Case MSOP-10L (Note 7) 39 oC/W Notes: 5. Power good is not valid for the first 100μs after EN goes high. Please refer to the application section for more information. 6. The output voltage accuracy includes line and load regulation over the full temperature range. 7. 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
High Efficiency Step-Down Low Power DC-DC Converter AP6015 Rev. 5-3 6 of 18 July 2020 www.diodes.com © Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN CONTACT US Typical Application Circuit For best transient response we suggest that RCC, CCC and L1 values as below. RCC CCC L1-WURTH C1, C2 (MLCC) VIN < 3.0V, VOUT < 2.5V 200KΩ 33PF 1.8µH 10µF VIN 3.0V, VOUT < 2.5V 68KΩ 100PF 1.8µH 10µF VIN 3.0V, VOUT 2.5V 82KΩ 100PF 3.3µH 10µF (1) ADJ Output Power Good 10µF 10µF VI 3.0 V to 5.5 V VO 2.5 V/800 mA LX FB PG PGND PVCC EN VCC GND CC AP6015 680K CCC 100pF R21µF
100 Ohm
R2: Suggest to be 39K~100K because of stability reasons. )1( R RVV REFO Typical Application Circuit for Adjustable Output Voltage Option (2) FIXED Output 10uFPower Good VI 5 V VO 1.8/ 2.5/ 3.3V/ 800mA LX FB PG PGND PVCC EN VCC GND CC AP6015 Typical Application CCC 680KC1 10uF 1uF Standard 5 V to 1.8/ 2.5/ 3.3V/ 800mA Conversion; High Efficiency
High Efficiency Step-Down Low Power DC-DC Converter AP6015 Rev. 5-3 12 of 18 July 2020 www.diodes.com © Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN CONTACT US Enable (EN) When EN is on logic low, the AP6015 goes into shutdown mode. In shutdown, all other functions are turned off. The supply current is reduced to 1uA (Typ.). Soft Start As the enable pin goes high, the soft -start function generates an internal voltage ramp. This causes the start-up current to slowly raise preventing output voltage overshoot and hig h inrush currents. The soft -start duration is typical 1mSec. AP6015 START -UP TIME Under Voltage Lock Out (UVLO) The UVLO prevents the converter from turning on when the voltage on VCC is less than typically 1.6V. 1.6V 3.6V 2.5V Vcc Vout UVLO
Application Information
High Efficiency Step-Down Low Power DC-DC Converter AP6015 Rev. 5-3 13 of 18 July 2020 www.diodes.com © Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN CONTACT US Power Good (PG) The PG comparator has an open drain output capable of sinking typically 10mA. The PG is only active when the AP6015 is enable (EN=high). When the AP6015 is disable (EN=low), the PG pin is high impedance. If the PG pin is connected to the output of the AP6015 with a pull -up resistor, no initial spike occurs and precautions have to be taken during start-up. The PG pin becomes active high when the output voltage exceeds typically 92% of its nominal value. Leave the PG pin unconnected when not used. PG Sink Current vs. ExteranI Voltage 2 2.5 3 3.6 4 4.5 5 5.5 External Voltage (V) PG Sink Current (mA) Application Information (Continued)
High Efficiency Step-Down Low Power DC-DC Converter AP6015 Rev. 5-3 14 of 18 July 2020 www.diodes.com © Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN CONTACT US Inductor Selection In order to avoid saturation of the inductor, the inductor should be rated at least for the maximum output current plus the inductor ripple current which is calculated as: fL V V VI CC O OL )(1 )()( L MAXOMAXL III Where: f= Switching frequency (1MHz typical) L = Inductor value △IL = Peak-to-peak inductor ripple current IL(max) = Maximum inductor current Vcc=3.6V Vout=2.5V f=1MHz L=3.3uH △IL≒230mA Vcc=3.6V Vout=2.5V f=1MHz L=1.8uH △IL≒360mA Application Information (Continued)
High Efficiency Step-Down Low Power DC-DC Converter AP6015 Rev. 5-3 15 of 18 July 2020 www.diodes.com © Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN CONTACT US Input Capacitor Selection Though there is no special requirement for the ESR (Equivalent Series Resistance) of the input capacitor, due attention should be paid to the tolerance and temperature coefficient of the capacitor used. A 10uF or larger capacitance is required between the PVCC and the GND pins. The input capacitor should be placed as close as possible to the PVCC pin in order to achieve good overall system performance. Output Capacitor Selection Ripple at the voltage output pin is caused by the charge-and-discharge of the output capacitor. For the best performance, a low ESR output capacitor should be used. The equation below demonstrates how the size of the ripple can be calculated. 1()8 )(1 ESRfCIESRfCfL V V VV O L O CC O Where: △Vo= Output voltage ripple L = Inductor value f = Switching frequency (1MHz typical) △IL = Peak-to-peak inductor ripple current Application Information (Continued)
High Efficiency Step-Down Low Power DC-DC Converter AP6015 Rev. 5-3 16 of 18 July 2020 www.diodes.com © Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN CONTACT US Layout Considerations A good board layout practice can significantly improve the stability of the application circuit and reduce the system noise. The feedback path must be as short as possible . The input capacitor and bypass capacitor must be placed close to the PVCC and the VCC pins for optimal performance. It is recommended that the ground planes for System Ground / Power Ground / Analog Ground are isolated from each others, while they should all be joined together at a common point . An example drawing of a circuit with good ground noise performance is shown below. Power Good 10 uF 10µF VI VO LX FB PG PGND PVCC EN VCC GND CC AP6015 680K CCC 100 pF 1µF The external inductor must be placed as close as possible to the switching node, i.e. the LX pin. The copper traces on the pcb, where high peak switching current may flow through, should be kept ‘wide’ and ‘short’. This results in low inductance and capacitance in the current path, hence ground shift problem is avoided and system stability stay within bound. Application Information (Continued)
High Efficiency Step-Down Low Power DC-DC Converter AP6015 Rev. 5-3 17 of 18 July 2020 www.diodes.com © Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN CONTACT US Marking Information 6015XX ( Top View ) Y W X Part Number Logo A~Z : Green 9 8 7 6 1 2 4 5 MSOP-10L XX : 18 for 1.8V 25 for 2.5V 33 for 3.3V Blank for ADJ Y : Year : 0~9 a~z : 27~52 week; z represents W : Week : A~Z : 1~26 week; 52 and 53 week Package Information (All Dimensions in mm) (1) Package type: 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" DET AIL "A" 1.10Max. Se ting plane0.5T yp. C C 10x- 0.30 8x- 0.50 10x- 1.4 Land Patte rn Re comme ndation (Unit:mm) 4.4
High Efficiency Step-Down Low Power DC-DC Converter AP6015 Rev. 5-3 18 of 18 July 2020 www.diodes.com © Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN CONTACT US IMPORTANT NOTICE LIFE SUPPORT Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products 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 our website, harmless against all damages. Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the President of Diodes Incorporated.