AS1323 1.6A Quiescent Current, Single Cell, DC-DC Step-up Converter General Description The AS1323 high-efficiency step-up DC-DC converter was designed specifically for single-cell, battery-powered devices where lowest quiescent current and high efficiency are essential. The compact device is available in three fixed-voltage variants with Vout of 2.7V, 3.0V, and 3.3V. It is perfect for a wide variety of applications where low quiescent currents and small form factors are critical. Integrated boot circuitry ensures start-up even with very-high load currents. The true output disconnect feature completely disconnects the output from the battery during shutdown. The device is available in a TSOT23-5 pin package. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of AS1323, 1.6A Quiescent Current, Single Cell, DC-DC Step-up Converter are listed below: Figure 1: Added Value of Using AS1323 Benefits Features Extended battery life * 1.6A Quiescent Current * Shutdown Current 0.1A * Efficiency Up to 85% Suitable to wide variety of applications * * * * * * Enables cost effective PCB design * No External Diode or FETs Needed * TSOT23-5 Package ams Datasheet [v1-11] 2014-Dec-16 Input Voltage Range: 0.75 to 2V Fixed Output Voltages: 2.7, 3.0 and 3.3V Output Voltage Accuracy: 3% Up to 100mA Output Current Output Disconnect in Shutdown Guaranteed 0.95V Start-Up Voltage Page 1 Document Feedback AS1323 - General Description Applications The devices are ideal for single-cell portable devices including mobile phones, MP3 players, PDAs, remote controls, personal medical devices, wireless transmitters and receivers, and any other battery-operated, portable device. Figure 2: Typical Operating Circuit 10H 1 5 VBATT 10F 3 1 VSS 2 SHDNN 3 5 LX 4 VOUT LX AS1323 SHDNN VBATT 2 VSS AS1323 4 VOUT 10F Page 2 Document Feedback ams Datasheet [v1-11] 2014-Dec-16 AS1323 - Pin Assignment Pin Assignment Figure 3: Pin Diagram (Top View) VBATT 1 VSS 2 5 LX AS1323 SHDNN 3 4 VOUT Pin Description Figure 4: Pin Description Pin Number Pin Name 1 VBATT 2 VSS Negative Supply and Ground 3 SHDNN Shutdown Input. 0 = Shutdown mode. 1 = Normal operating mode. 4 VOUT 5 LX ams Datasheet [v1-11] 2014-Dec-16 Description Battery Supply Input and Coil Connection Output. This pin also supplies bootstrap power to the device. Inductor Connection. This pin is connected to the internal N-channel MOSFET switch drain and P-channel synchronous rectifier drain. Page 3 Document Feedback AS1323 - Absolute Maximum Ratings Stresses beyond those listed in Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in Electrical Characteristics is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Absolute Maximum Ratings Figure 5: Absolute Maximum Ratings Parameter Min Max Units VBATT, SHDNN, LX to VSS -0.3 +5 V Maximum Current VOUT, LX 1 A Thermal Resistance JA 207.4 C/W Electro-Static Discharge 2 kV Operating Temperature Range -40 85 C Storage Temperature Range -65 150 C 150 C Junction Temperature Package Body Temperature Relative Humidity non-condensing RHNC Moisture Sensitivity Level MSL Page 4 Document Feedback 5 260 C 85 % Comments on PCB HBM The reflow peak soldering temperature (body temperature) specified is in accordance with IPC/JEDEC J-STD-020 "Moisture/Reflow Sensitivity Classification for Non-Hermetic Solid State Surface Mount Devices". The lead finish for Pb-free leaded packages is matte tin (100% Sn). 1 ams Datasheet [v1-11] 2014-Dec-16 AS1323 - Electrical Characteristics Electrical Characteristics DC Electrical Characteristics TAMB = -40C to 85C, VBATT = 1.2V, VOUT = VOUT (NOM), SHDNN = VOUT, RLOAD = , unless otherwise noted. Typical values are at TA = 25C.(unless otherwise specified). Limits are 100% production tested at TAMB = 25C. Limits over the operating temperature range are guaranteed by design. Figure 6: Electrical Characteristics Symbol Parameter Condition VINMIN Minimum Input Voltage VIN Operating Input Voltage TAMB = 25C Minimum Start-Up Input Voltage TAMB = 25C, RLOAD = 100 VINSU VOUT RLOAD Min Typ Max 0.75 0.95 V 2 V 0.75 0.95 V AS1323-27 2.619 2.7 2.781 AS1323-30 2.91 3.0 3.09 AS1323-33 3.201 3.3 3.399 30 40 mV N-Channel ON-Resistance 0.5 1.0 P-Channel ON-Resistance 0.75 1.5 Output Voltage Load depended drop of VOUT VBATT = 1.5V; ILOAD = 45mA RDS-ON ILIMIT tON Unit N-Channel Switch Current Limit Programmed at 400mA V 400 mA Switch Maximum ON-Time 6 s Synchronous Rectifier Zero-Crossing Current 10 mA 6 A IOP-OUT Operating Current into VBATT IQ-OUT Quiescent Current to VOUT IQ-BAT Quiescent Current into VBATT ams Datasheet [v1-11] 2014-Dec-16 VBATT = 1.5V, VOUT = 3.3V, TAMB = 25C VBATT = 1.5V, TAMB = 25C 1.6 3 A 0.3 1 A Page 5 Document Feedback AS1323 - Electrical Characteristics Symbol ISDI-OUT (1) Parameter Condition Min Typ Shutdown Current to VOUT ISDI-BAT Shutdown Current into VBATT VIL SHDNN Voltage Threshold, Low VIH SHDNN Voltage Threshold, High ISDI SHDNN Input Bias Current VBATT = 1.5V, TAMB = 25C Max Unit 200 nA 100 nA 150 TAMB = 25C, VSDI = VOUT mV 100 900 mV 300 nA Note(s) and/or Footnote(s): 1. VOUT is completely disconnected (0V) during shutdown. 2. All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC (Statistical Quality Control) methods. Page 6 Document Feedback ams Datasheet [v1-11] 2014-Dec-16 AS1323 - Typical Operating Characteristics Typical Operating Characteristics VOUT= 3.3V; TA = 25 C; CIN = COUT = 10F, L = 10H, ILOAD = 10mA; VBATT = 1.5V; unless otherwise specified. Figure 7: Efficiency vs. Output Current; VOUT = 3.3V 90 VIN = 1.8V Efficiency (%) . 80 VIN = 1.2V VIN = 1.5V VIN = 0.95V 70 60 50 40 30 0.1 1 10 100 Output Current (mA) Figure 8: Efficiency vs. Output Current; VOUT = 3.0V 90 VIN = 1.8V 80 Efficiency (%) . VIN = 1.5V VIN = 1.2V 70 VIN = 0.95V 60 50 40 30 0.1 1 10 100 Output Current (mA) ams Datasheet [v1-11] 2014-Dec-16 Page 7 Document Feedback AS1323 - Typical Operating Characteristics Figure 9: Efficiency vs. Output Current; VOUT = 2.7V 90 VIN = 1.8V 80 Efficiency (%) . VIN = 1.5V VIN = 1.2V 70 VIN = 0.95V 60 50 40 30 0.1 1 10 100 Output Current (mA) Figure 10: Efficiency vs. Input Voltage 90 Efficiency (%) . 80 70 60 50 Il oad = 80A 40 Il oad = 800A Il oad = 11mA 30 0.75 1 1.25 1.5 1.75 2 Input Voltage (V) Page 8 Document Feedback ams Datasheet [v1-11] 2014-Dec-16 AS1323 - Typical Operating Characteristics Figure 11: Output Voltage vs. Temperature 3.32 Output Voltage (V) . 3.315 No Load 3.31 3.305 ILOAD = 10mA 3.3 3.295 ILOAD = 30mA 3.29 3.285 3.28 -50 -25 0 25 50 75 100 125 Temperature (C) Figure 12: Output Voltage vs. Output Current 3.4 Output Voltage (V) . 3.35 VIN = 1.5V 3.3 VIN = 1.2V 3.25 3.2 3.15 3.1 3.05 3 0 10 20 30 40 50 60 70 Output Current (mA) ams Datasheet [v1-11] 2014-Dec-16 Page 9 Document Feedback AS1323 - Typical Operating Characteristics Figure 13: Output Voltage vs. Input Voltage 3.4 Output Voltage (V) . 3.38 3.36 3.34 3.32 3.3 3.28 3.26 3.24 3.22 3.2 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Input Voltage (V) Figure 14: Shutdown Current vs. Temperature Input Current (nA) . 1000 100 VIN = 1.5V VIN = 1.2V 10 1 0.1 -50 -25 0 25 50 75 100 125 Temperature (C) Page 10 Document Feedback ams Datasheet [v1-11] 2014-Dec-16 AS1323 - Typical Operating Characteristics Figure 15: Minimum Input Startup Voltage vs. Temperature Input Voltage (V) . 1 0.9 0.8 0.7 0.6 0.5 -50 -25 0 25 50 75 100 125 Temperature (C) Figure 16: Output Voltage vs. Input Voltage; VOUT = 2.7V 2.78 Output Voltage (V) . 2.76 2.74 IOUT = 0mA 2.72 IOUT = 10mA 2.7 IOUT = 30mA 2.68 2.66 2.64 2.62 0.75 1 1.25 1.5 1.75 2 Input Voltage (V) ams Datasheet [v1-11] 2014-Dec-16 Page 11 Document Feedback AS1323 - Typical Operating Characteristics Figure 17: Output Voltage vs. Input Voltage; VOUT = 3.0V 3.1 Output Voltage (V) . 3.08 3.06 3.04 IOUT = 0mA 3.02 IOUT = 10mA 3 2.98 IOUT = 30mA 2.96 2.94 2.92 2.9 0.75 1 1.25 1.5 1.75 2 Input Voltage (V) Figure 18: Output Voltage vs. Input Voltage; VOUT = 3.3V 3.4 Output Voltage (V) . 3.38 3.36 3.34 IOUT = 0mA IOUT = 10mA 3.32 3.3 IOUT = 30mA 3.28 3.26 3.24 3.22 3.2 0.75 1 1.25 1.5 1.75 2 Input Voltage (V) Page 12 Document Feedback ams Datasheet [v1-11] 2014-Dec-16 AS1323 - Typical Operating Characteristics Figure 19: Output Current vs. Input Voltage 110 . 100 Output Current (mA) 90 80 VOUT = 3.0V 70 VOUT = 3.3V 60 VOUT = 2.7V 50 40 30 20 0.75 1 1.25 1.5 1.75 2 Input Voltage (V) Figure 20: SHDNN Threshold vs. Input Voltage SHDNN Threshold Voltage (V) . 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0.8 1 1.2 1.4 1.6 1.8 2 Input Voltage (V) ams Datasheet [v1-11] 2014-Dec-16 Page 13 Document Feedback AS1323 - Typical Operating Characteristics ILX 20mA/DIV VLX 2V/Div VOUT 50mV/Div Figure 21: Switching Waveform; VOUT = 2.7V 200s/Div ILX 20mA/DIV VLX 2V/Div VOUT 50mV/Div Figure 22: Switching Waveform; VOUT = 3.0V 200s/Div Page 14 Document Feedback ams Datasheet [v1-11] 2014-Dec-16 AS1323 - Typical Operating Characteristics ILX 20mA/DIV VLX 2V/Div VOUT 50mV/Div Figure 23: Switching Waveform; VOUT = 3.3V 200s/Div ams Datasheet [v1-11] 2014-Dec-16 Page 15 Document Feedback AS1323 - Detailed Description The AS1323 is a compact, high-efficiency, step-up DC-DC converter guaranteed to start up with voltages as low as 0.95V, and operate with an input voltage down to 0.75V. Consuming only 1.6A of quiescent current, the device includes an integrated synchronous rectifier that eliminates the need for an external diode and improves overall efficiency by minimizing losses (see Synchronous Rectification). The AS1323 also features an active-low shutdown circuit that supply current to 0.1A. Detailed Description Figure 24: AS1323 Block Diagram L1 4 1 0.95 to 1.6V VOUT VBATT CIN COUT Comparator Discharge Comparator Voltage Control Logic Startup System Timing 3 SHDNN AS1323 5 LX Ref Comparator Charge 2 VSS PFM Control A forced discontinuous, current-limited, pulse-frequency modulation (PFM) control scheme provides ultra-low quiescent current and high efficiency over a wide output current-range. Rather than using an integrated oscillator, the inductor current is limited by the 400mA N-channel current limit or by the 6s switch maximum ON-time. After each device-ON cycle, the inductor current must ramp to zero before another cycle can start. When the error comparator senses that the output has fallen below the regulation threshold, another cycle can begin. Page 16 Document Feedback ams Datasheet [v1-11] 2014-Dec-16 AS1323 - Detailed Description Synchronous Rectification The integrated synchronous rectifier eliminates the need for an external Schottky diode, reducing cost and PCB space. During normal operation, while the inductor discharges, the P-channel MOSFET turns on and shunts the MOSFET body diode. Consequently the rectifier voltage drop is significantly reduced improving efficiency without the need for external components. Low-Voltage Startup Circuit The AS1323 contains a unique low-voltage startup circuit which ensures start-up even with very high load currents. The minimum start-up voltage is independent of the load current. This device is powered from pin VBATT, guaranteeing startup at input voltages as low as 0.95V. Shutdown The AS1323 enter shutdown when the SHDNN pin is driven low. During shutdown, the output is completely disconnected from the battery. Shutdown can be pulled as high as 3.6V, regardless of the voltage at pins VBATT or VOUT. For normal operation, connect SHDNN to the input. ams Datasheet [v1-11] 2014-Dec-16 Page 17 Document Feedback AS1323 - Application Information Application Information Figure 25: Typical Application Diagram 10H 1 5 LX VBATT 10F AS1323 3 SHDNN 2 VSS 4 VOUT 10F Inductor Selection The control scheme of the AS1323 allows for a wide range if inductor values. A 10H inductor should be sufficient for most applications (see Figure 25). Smaller inductance values typically offer smaller physical size for a given series resistance, allowing the smallest overall circuit dimensions. Applications using larger inductance values may startup at lower battery voltages, provide higher efficiency and exhibit less ripple, but they may reduce the maximum output current. This occurs when the inductance is sufficiently large to prevent the maximum current limit (ILIMIT) from being reached before the maximum ON-time (t ON) expires (see Figure 6). For maximum output current, the inductor value should be chosen such that the controller reaches the current-limit before the maximum ON-time is triggered: (EQ1) V BATT t ON L > -------------------------------I LIMIT t ONMAX is 6s (typ) ILIMIT is 400mA (typ) For larger inductor values, the peak inductor current (IPEAK) can be determined by: (EQ2) Page 18 Document Feedback V BATT t ON I PEAK = -------------------------------L ams Datasheet [v1-11] 2014-Dec-16 AS1323 - Application Information The inductor's incremental saturation current rating should be greater than the peak switching current. However, it is generally advisable to bias the inductor into saturation by as much as 20%, although this will slightly reduce efficiency. Maximum Output Current The maximum output current (IOUT MAX) is a function of IPEAK, VIN, VOUT, and the overall efficiency () as indicated in the formula for determining IOUT MAX: (EQ3) 1 V BATT I OUTMAX = --- I PEAK ----------------- V OUT 2 Capacitor Selection Choose input and output capacitors to supply the input and output peak currents with acceptable voltage ripple. The input filter capacitor (C IN) reduces peak currents drawn from the battery and improves efficiency. Low equivalent series resistance (ESR) capacitors are recommended. Note(s): Ceramic capacitors have the lowest ESR, but low ESR tantalum or polymer capacitors offer a good balance between cost and performance. Output voltage ripple has two components: variations in the charge stored in the output capacitor with each COIL pulse, and the voltage drop across the capacitor's ESR caused by the current into and out of the capacitor: (EQ4) V RIPPLE = VRIPPLE(C) + V RIPPLE(ESR) (EQ5) V RIPPLE(ESR) = IPEAK R ESR(COUT (EQ6) 2 2 1 L V RIPPLE ( C ) --- -------------------------------------------------------------- ( I PEAK - I OUT ) 2 ( V OUT - V BATT ) C OUT Where: IPEAK is the peak inductor current. For ceramic capacitors, the output voltage ripple is typically dominated by VRIPPLE(C). For example, a 10F ceramic capacitor and a 10H inductor typically provide 75mV of output ripple when stepping up from 1.2V to 3.3V at 50mA. Low input-to-output voltage differences require higher output capacitor values. Capacitance and ESR variation of temperature should be considered for best performance in applications with wide operating temperature ranges. ams Datasheet [v1-11] 2014-Dec-16 Page 19 Document Feedback AS1323 - Application Information PC Board Layout Considerations The AS1323 has been specially designed to be tolerant to PC board parasitic inductances and resistances. However, to achieve maximum efficiency a careful PC board layout and component selection is vital. Note(s): For the optimal performance, the IC's VSS and the ground leads of the input and output capacitors must be kept less than 5mm apart using a ground plane. In addition, keep all connections to COIL as short as possible. The system robustness guarantees a reliable operation even if those recommendations are not fully applied. Page 20 Document Feedback ams Datasheet [v1-11] 2014-Dec-16 AS1323 - Package Drawings & Markings Package Drawings & Markings The device is available in an TSOT23-5 package. Figure 26: TSOT23-5 Package RoHS Green Symbol A A1 A2 b b1 c c1 D E E1 e e1 Min 0.01 0.84 0.30 0.31 0.12 0.08 Typ 0.05 0.87 0.35 0.15 0.13 2.90BSC 2.80BSC 1.60BSC 0.95BSC 1.90BSC Max Notes 1.00 0.10 0.90 0.45 0.39 0.20 0.16 3,4 3,4 3,4 Symbol Min Typ Max L L1 L2 N R R1 q 1 0.30 0.40 0.60REF 0.25BSC 5 0.50 0.10 0.10 0 4 4 10 Notes 0.25 8 12 Tolerances of Form and Position aaa bbb ccc ddd 0.15 0.25 0.10 0.20 Note(s) and/or Footnote(s): 1. Dimensions are in millimeters. 2. Dimension D does not include mold flash, protrusions, or gate burrs. Mold flash, protrusions, and gate burrs shall not exceed 0.15mm per end. Dimension E1 does not include interlead flash or protrusion. Interlead flash or protrusion shall not exceed 0.15mm per side. Dimensions D and E1 are determined at datum H. 3. The package top can be smaller than the package bottom. Dimensions D and E1 are determined at the outermost extremes of the plastic body exclusive of mold flash, tie bar burrs, gate burrs, and interlead flash, but include any mismatches between the top of the package body and the bottom. D and E1 are determined at datum H. ams Datasheet [v1-11] 2014-Dec-16 Page 21 Document Feedback AS1323 - Package Drawings & Mark ings Figure 27: AS1323 Marking Top Marking Bottom Marking Pin1 Pin1 Figure 28: Packaging Markings: YYYY XXXX Marking code Trace code Note(s) and/or Footnote(s): 1. See Figure 30 for ordering codes of different AS1323 variants. Page 22 Document Feedback ams Datasheet [v1-11] 2014-Dec-16 AS1323 - Package Drawings & Markings Tape and Reel Pin1 Orientation Figure 29: Tape & Reel Pin1 Orientation User direction of feed Top, Through View TSOT23-5 ams Datasheet [v1-11] 2014-Dec-16 TSOT23-5 TSOT23-5 TSOT23-5 Page 23 Document Feedback AS1323 - Ordering & Contact Information Ordering & Contact Information The device is available as the standard products shown in the figure below. Figure 30: Ordering Information Ordering Code Marking Output Description Delivery Form Package AS1323-BTTT-27 ASJN 2.7V 1.6A Quiescent Current, Single Cell, DC-DC Step-up Converter Tape and Reel TSOT23-5 AS1323-BTTT-30 ASMP 3.0V 1.6A Quiescent Current, Single Cell, DC-DC Step-up Converter Tape and Reel TSOT23-5 AS1323-BTTT-33 ASMQ 3.3V 1.6A Quiescent Current, Single Cell, DC-DC Step-up Converter Tape and Reel TSOT23-5 Buy our products or get free samples online at: www.ams.com/ICdirect Technical Support is available at: www.ams.com/Technical-Support Provide feedback about this document at: www.ams.com/Document-Feedback For further information and requests, e-mail us at: ams_sales@ams.com For sales offices, distributors and representatives, please visit: www.ams.com/contact Headquarters ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten Austria, Europe Tel: +43 (0) 3136 500 0 Website: www.ams.com Page 24 Document Feedback ams Datasheet [v1-11] 2014-Dec-16 AS1323 - RoHS Compliant & ams Green Statement RoHS Compliant & ams Green Statement RoHS: The term RoHS compliant means that ams AG products fully comply with current RoHS directives. Our semiconductor products do not contain any chemicals for all 6 substance categories, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, RoHS compliant products are suitable for use in specified lead-free processes. ams Green (RoHS compliant and no Sb/Br): ams Green defines that in addition to RoHS compliance, our products are free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material). Important Information: The information provided in this statement represents ams AG knowledge and belief as of the date that it is provided. ams AG bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. ams AG has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ams AG and ams AG suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. ams Datasheet [v1-11] 2014-Dec-16 Page 25 Document Feedback AS1323 - Copyrights & Disclaimer Copyrights & Disclaimer Copyright ams AG, Tobelbader Strasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. Devices sold by ams AG are covered by the warranty and patent indemnification provisions appearing in its General Terms of Trade. ams AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein. ams AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with ams AG for current information. This product is intended for use in commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by ams AG for each application. This product is provided by ams AG "AS IS" and any express or implied warranties, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclaimed. ams AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of ams AG rendering of technical or other services. Page 26 Document Feedback ams Datasheet [v1-11] 2014-Dec-16 AS1323 - Document Status Document Status Document Status Product Preview Preliminary Datasheet Datasheet Datasheet (discontinued) ams Datasheet [v1-11] 2014-Dec-16 Product Status Definition Pre-Development Information in this datasheet is based on product ideas in the planning phase of development. All specifications are design goals without any warranty and are subject to change without notice Pre-Production Information in this datasheet is based on products in the design, validation or qualification phase of development. The performance and parameters shown in this document are preliminary without any warranty and are subject to change without notice Production Information in this datasheet is based on products in ramp-up to full production or full production which conform to specifications in accordance with the terms of ams AG standard warranty as given in the General Terms of Trade Discontinued Information in this datasheet is based on products which conform to specifications in accordance with the terms of ams AG standard warranty as given in the General Terms of Trade, but these products have been superseded and should not be used for new designs Page 27 Document Feedback AS1323 - Revision Information Revision Information Changes from 1.05 (2010-May) to current revision 1-11 (2014-Dec-16) Page Content of austriamicrosystems datasheet was converted to latest ams design Updated General Description section 1 Updated Figure 5 4 Added Figure 20 13 Updated description of Inductor Selection 18 Updated Marking Information and Packaging Code 22 Note(s) and/or Footnote(s): 1. Page and figure numbers for the previous version may differ from page and figure numbers in the current revision. 2. Correction of typographical errors is not explicitly mentioned. Page 28 Document Feedback ams Datasheet [v1-11] 2014-Dec-16 AS1323 - Content Guide Content Guide ams Datasheet [v1-11] 2014-Dec-16 1 1 2 General Description Key Benefits & Features Applications 3 3 Pin Assignment Pin Description 4 Absolute Maximum Ratings 5 5 Electrical Characteristics DC Electrical Characteristics 7 Typical Operating Characteristics 16 16 17 17 17 Detailed Description PFM Control Synchronous Rectification Low-Voltage Startup Circuit Shutdown 18 18 19 19 20 Application Information Inductor Selection Maximum Output Current Capacitor Selection PC Board Layout Considerations 21 23 Package Drawings & Markings Tape and Reel Pin1 Orientation 24 25 26 27 28 Ordering & Contact Information RoHS Compliant & ams Green Statement Copyrights & Disclaimer Document Status Revision Information Page 29 Document Feedback Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: ams: AS1323-BTTT-30 AS1323-27-EB AS1323-BTTT-33 AS1323-30-EB AS1323-BTTT-27