AP1601

AP1601

Document overview

• Manufacturer or author: Diodes Incorporated
• PDF pages: 12

Technical content

Features

 A Guaranteed Start-Up from less than 0.9V.  High Efficiency.  Low Quiescent Current.  Less Number of External Components needed.  Low Ripple and Low Noise.  Space Saving Packages: MSOP-8L and MSOP-10L.  MSOP-8L and MSOP-10L: Available in “Green” Molding Compound (No Br, Sb)  Lead Free Finish / RoHS Compliant (Note 1)  For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/

Applications

 Pagers  Cameras  Wireless Microphones  Pocket Organizers  Battery Backup Suppliers  Portable Instruments

Ordering Information

M8 : MSOP-8L 13 : Tape & Reel M10 : MSOP-10L G : Green Device Package Code Packaging (Note 2) 13” Tape and Reel Quantity Part Number Suffix AP1601M8G-13 M8 MSOP-8L 2500/Tape & Reel -13 AP1601M10G-13 M10 MSOP-10L 2500/Tape & Reel -13 Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html. 2. Pad layout as shown in Diodes Incorporated’s package outline PDFs, which can be found on our website at http://www.diodes.com/package-outlines.html. PART OBSOLETE - USE AP6714

Document number: DS31402 Rev. 6 - 4 2 of 12 www.diodes.com March 2020 © Diodes Incorporated OBSOLETE – PART DISCONTINUED AP1601 Pin Assignment MSOP-8L FB LBI REF OUT LX GNDLBO SHDN ( Top View ) MSOP-10L FB LBI OUT LX GND 4 7CLSEL 5 6REF BATT SHDN LBO ( Top View ) Pin Descriptions Pin Name Description FB Use a resistor network to set the output voltage from +2.0V to +5.5V. If FB=VOUT, VOUT t=3.3V fix voltage FB=GND, VOUT =5V fix voltage LBI Low-Battery Comparator Input. Internally set to trip at +1.30V. LBO Open-Drain Low-Battery Comparator Output. Connect LBO to OUT through a 100kΩ resistor. Output is low when VLBI is <1.2V. LBO is high impedance during shutdown. REF 1.2V Reference Voltage. Bypass with a 0.1μF capacitor. OUT Power Output. OUT provides bootstrap power to the IC. LX N-Channel and P-Channel Power MOSFET Drain GND Ground SHDN Shutdown Input. Drive high (>80% of VOUT) for operating mode. Drive low (<20% of VOUT) for shutdown mode. Connect to OUT for normal operation. BATT Battery Input and Damping Switch Connection. If damping switch is unused, leave BATT unconnected.

Document number: DS31402 Rev. 6 - 4 3 of 12 www.diodes.com March 2020 © Diodes Incorporated OBSOLETE – PART DISCONTINUED AP1601 Functional Block Diagram +-+- + - S QR F/F TRIG One-Shot Q One-Shot QTRIG Maximum On-Time One-Shot Error Amplifier Current-Limit Amplifier Low-Battery Comparator Reference Zero Crossing Amplifier Minimum Off-Time One-Shot LBO LBI + - + - Damping Switch OUT LX GND BATT FB REF 0.1uF 22uH 200 0.1uF +47uF 47uF SHDN CLSEL VOUT 100k VIN P N VIN EN Ω Typical Application Circuit SHDN LBO LX OUT FBREF LBI GND 0.1uF Low- Battery Detect OUT 22uH 220uF 100uF +VIN ON OFF Adj Output (1.8V to 4.0V) up to 300 mA Low- Battery Detect In Vout=1.2 (1+ )R6 R6 Suggest 100K~200K FB=Vout, Vout=3.3V FB=GND, Vout=5V

Document number: DS31402 Rev. 6 - 4 4 of 12 www.diodes.com March 2020 © Diodes Incorporated OBSOLETE – PART DISCONTINUED AP1601 Absolute Maximum Ratings Symbol Parameter Rating Unit ESD HBM Human Body Model ESD Protection 2 KV ESD MM Machine Model ESD Protection 200 V VCC Supply Voltage (OUT to GND) -0.3 to 8.0 V VBATT Battery Voltage (Batt to GND) -0.3 to 6.0 V - LBI, REF, FB, CLSEL to GND -0.3 to VOUT+0.3 V VSW Switch Voltage (LX to GND) -0.3 to VOUT+0.3 V IOUT Output Current (OUT) -1.5 to +1.5 A VLBO LBO to GND 6.0 V ISW Switch Current (LX) -1.5 to +1.5 A TJ Operation Junction Temperature Range -40 to +125 oC TST Storage Temperature Range -65 to +150 oC Recommended Operating Conditions Symbol Parameter Min Max Unit VIN Input Voltage 1.1 5.5 V IOUT Output Current - 1.2 A TA Operating Ambient Temperature -40 +85 ºC

Document number: DS31402 Rev. 6 - 4 5 of 12 www.diodes.com March 2020 © Diodes Incorporated OBSOLETE – PART DISCONTINUED AP1601

Electrical Characteristics

(VBATT = 2V, FB = OUT (VOUT = 3.3V), RL = ∞, TA = 0° C to +85° C, unless otherwise noted. Typical values are at TA = +25° C.) Symbol Parameter Conditions Min Typ. Max Unit - Minimum Input Voltage - - 0.9 - V VIN Operating Voltage TA = +25° C 1.1 - 5.5 V - Start-Up Voltage TA = +25° C, RL = 3kΩ (Note 3) - 0.9 1.1 V - Start-Up Voltage Temperature - - -2 - mV/°C - Output Voltage Range - 2 - 5.5 V IOUT Steady-State Output Current (Note 4) (VOUT = 3.3V) AP1601 (CLSEL=OUT) 300 420 - mA AP1601 (CLSEL=GND) 150 220 - (VOUT = 5V) AP1601 (CLSEL=OUT) 180 285 - AP1601 (CLSEL=GND) 90 130 - VREF Reference Voltage IREF=0 1.176 1.2 1.224 V TEMPCO Reference Voltage Temperature - - 0.024 - mV/°C VREF_LOAD Reference Voltage Load Regulation IREF=0 to 20μA - 30 80 mV VREF_LINE Reference Voltage Line Regulation VOUT=2V to 5.5V - 0.08 2.5 mV/V - FB, LB1 Input Threshold - 1.176 1.2 1.224 V RDS(ON) Internal NFET, PFET On- Resistance ILX=100mA - 0.3 0.6 Ω ILIM LX Switch Current Limit (NFET) AP1601 MSOP-8L 0.80 1 1.20 A AP1601 MSOP-10L (CLSEL=OUT) 0.80 1 1.20 AP1601 MSOP-10L (CLSEL=GND) 0.40 0.50 0.65 ILEAK LX Leakage Current ILX=0, 5.5V; VOUT=5.5V - 0.05 1 μA θJA Thermal Resistance Junction- to-Ambient MSOP-8L (Note 5) - 118 - oC/W MSOP-10L (Note 5) - 88 - θJC Thermal Resistance Junction-to-Case MSOP-8L (Note 5) - 30 - oC/W MSOP-10L (Note 5) - 16 - Notes: 3. Start-up voltage operation is guaranteed with the addition of a Schottky B 0520LW external diode between the input and output. 4. Steady-state output current indicates that the device maintains output voltage regulation under load. 5. Test condition for MSOP-8L and MSOP-10L: Devices mounted on 2oz copper, with minimum recommended pad layout on top and bottom layer with thermal vias, double side FR-4 PCB.

Document number: DS31402 Rev. 6 - 4 6 of 12 www.diodes.com March 2020 © Diodes Incorporated OBSOLETE – PART DISCONTINUED AP1601 Electrical Characteristics (continued) (VBATT = 2V, RL =∞, TA = 0° C to +85° C, unless otherwise noted. Typical values are at TA = +25° C.) Symbol Parameter Conditions Min Typ. Max Unit - Operating Current into OUT VFB=1.4V, VOUT=3.3V - 16 35 μA - Shutdown Current into OUT SHDN =GND - 0.1 1 μA Efficiency VOUT=3.3V, ILOAD=200mA - 90 - % VOUT=2V, ILOAD=1mA - 85 - tON LX Switch On-Time VFB=1V, VOUT=3.3V 3 4 7 μs tOFF LX Switch Off-Time VFB=1V, VOUT=3.3V 0.8 1 1.2 μs IFB FB Input Current VFB=1.4V - 0.03 50 nA ILBI LBI Input Current LLBI=1.4V - 1 50 nA ICLSEL CLSEL Input Current AP1601, CLSEL=OUT - 1.4 3 μA ISHDN SHDN Input Current VSHDN =0 or VOUT - 0.07 50 nA LBO Low Output Voltage LLBI=0, ISINK=1mA - 0.2 0.4 V ILBO LBO Off Leakage Current VLBO =5.5V, LLBI=5.5V - 0.07 1 μA Damping Switch Resistance AP1601, VBATT=2V - 88 150 Ω VIL SHDN Input Voltage - - - 0.2 VOUT V VIH - 0.8 VOUT - - VIL CLSEL Input Voltage - - - 0.2 VOUT V VIH - 0.8 VOUT - -

Document number: DS31402 Rev. 6 - 4 7 of 12 www.diodes.com March 2020 © Diodes Incorporated OBSOLETE – PART DISCONTINUED AP1601 Functional Description

Document number: DS31402 Rev. 6 - 4 8 of 12 www.diodes.com March 2020 © Diodes Incorporated OBSOLETE – PART DISCONTINUED AP1601 Functional Description (continued)

Document number: DS31402 Rev. 6 - 4 9 of 12 www.diodes.com March 2020 © Diodes Incorporated OBSOLETE – PART DISCONTINUED AP1601 Functional Description General Description AP1601 PFM (pulse frequency modulation) converter IC series combine a switch mode converter, N-channel power MOSFET, precision voltage reference, and voltage detector in a single monolithic device. They offer both extreme low quiescent current, high efficiency, and very low gate threshold voltage to ensure start -up with low battery voltage (0. 9V typ.). Designed to maximize battery life in portable products, and minimize switching losses by only switching as needed service the load. PFM converters transfer a discrete amount of energy per cycle and regulate the output voltage by modulating switching frequency with the constant turn-on time. Switching frequency depends on load, input voltage, and inductor value, and it can range up to 100KHz. The SW on resistance is typically 1 to 1.5W to minimize switch losses. When the output voltage drops, the error comparator enables 100KHz oscillator that turns on the MOSFET around 7.5us and 2.5ms off time. Turning on the MOSFET allows inductor current to ramp up, storing energy in a magnetic field and when MOSFET turns off that force inductor current through diode to the output capacitor and load. As the stored energy is depleted, the current ramp down until the diode turns off. At this point, inductor may ring due to residual energy and stray capacitance. The output capacitor stores charge when current flowing through the diode is high, and release it when current is low, thereby maintaining a steady voltage across the load. As the load increases, the output capacitor discharges faster and the error comparator initiates cycles sooner, increasing the switching frequency. The maximum duty cycle ensure adequate time for energy transfer to output during the second half each cycle. Depending on circuit, PFM converter can operate in either discontinuous mode or continuous conduction mode. Continuous conduction mode means that the inductor current does not ramp to zero during each cycle. Diode Selection Speed, forward drop, and leakage current are the three main considerations in selecting a rectifier diode. Best performance is obtained with Schottky rectifier diode, such as 1N5819. Motorola makes B 0520LW in surface mount. For lower output powe r a 1N4148 can be used although efficiency and start up voltage will suffer substantially. Inductor Selection To operate as an efficient energy transfer element, the inductor must fulfill three requirements. First, the inductance must be low enough for th e inductor to store adequate energy under the worst case condition of minimum input voltage and switch ON time. Second, the inductance must also be high enough so maximum current rating of AP1601 and inductor are not exceed at the other worst case conditio n of maximum input voltage and ON time. Lastly, the inductor must have sufficiently low DC resistance so excessive power is not lost as heat in the wind ings. But unfortunately this is inversely related to physical size. Minimum and Maximum input voltage, output voltage and output current must be established before and inductor can be selected. Capacitor Selection A poor choice for a output capacitor can result in poor efficiency and high output ripple. Ordinary aluminum electrolyzers, while inexpensive may have unacceptably poor ESR and ESL. There are low ESR aluminum capacitors for switch mode DC-DC converters which work much better than general propose unit. Tantalum capacitors provide still better performance at more expensive. OS -CON capacitors have extremely low ESR in a small size. If capacitance is reduced, output ripple will increase. Most of the input supply is supplied by the input bypass capacitor. The capacitor voltage rating should be at least 1.25 times greater than a maximum input voltage.

Document number: DS31402 Rev. 6 - 4 10 of 12 www.diodes.com March 2020 © Diodes Incorporated OBSOLETE – PART DISCONTINUED AP1601 Marking Information (1) MSOP-8L AP1601 ( Top View ) Y W X Part Number Logo Y : Year : 0~9 A~Z : Green 8 7 6 5 1 2 3 4 a~z : 27~52 week; z represents W : Week : A~Z : 1~26 week; 52 and 53 week (2) MSOP-10L AP1601 ( Top View ) Y W X Part Number Logo 9 8 7 6 1 2 4 5 Y : Year : 0~9 A~Z : Green A~Z : 27~52 week; Z represents W : Week : a~z : 1~26 week; 52 and 53 week

Document number: DS31402 Rev. 6 - 4 11 of 12 www.diodes.com March 2020 © Diodes Incorporated OBSOLETE – PART DISCONTINUED AP1601 Package Information (All Dimensions in mm) Please see http://www.diodes.com/package-outlines.html for the latest version. (1) Package Type: MSOP-8L 2.9/3.1 4.7/5.1 0.65Bsc. 0.22/0.38 0.05 0.15T yp. 0.4/0.8 0.25 0.95Re f. Gauge plane 0°/8° "A" DET AIL "A" 6x- 0.65 Land Patte rn Recomme ndation (Unit:mm) 8x- 1.4 4.4 8x- 0.45 0.05/0.15 (2) 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 Recomme ndation (Unit:mm) 4.4

Document number: DS31402 Rev. 6 - 4 12 of 12 www.diodes.com March 2020 © Diodes Incorporated OBSOLETE – PART DISCONTINUED AP1601 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 other 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 unde r its patent or trademark rights, nor the rights of others. Any Customer or user of th is document or products described 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 Diod es Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized 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 fees arising ou t 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 name s and markings noted herein may also be covered by one or more United States, international or foreign trademarks. This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the final and determinative format released by Diodes Incorporated. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the ex press 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 i n 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 d evices 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 Incor porated. 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 © 2020, Diodes Incorporated www.diodes.com