AL2010 AKM | Alldatasheet
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Technical content
[AL2010] Rev. 1.0 2011/08 9 1 9 GENERAL DISCRIPTION AL2010 is the Current-Mode Synchronous Step-Down DC-DC Convertor which offers excellent transient response. Output voltage is selectable between 0.8V and 5.0V by the external resister. Input voltage range is in AL2010, which is maximum current is 2.5A. The switching frequency is selectable between 300 kHz and 4 MHz by the external resister. For the protections, AL2010 has Over-Current protection, Low-Input Voltage protection, and Power-Good function. FEATURE /square6 Step Down DCDC Converter ・Input Voltage Range: 3.0V to 5.5V ・Output Voltage Range: 0.8V to 5.0V (by the external resister) ・Maximum Output Load Current: 2.5A ・Operation Temperature: -40 °C to 85 °C ・Switching Frequency: 300kHz to 4MHz (Selectable by an external resister. And Available External Synchronous Mode by the external clock) ・Low Input Voltage Protection ・Power-Good Function ・Over-Current Protection (Automatic recovery type) ・Thermal Protection ・Internal Reference Voltage: ±1.5% (Ta = 25 °C) ・Maximum Duty: 100% ・Soft Start Function ・PKG: TSSOPE-16 Current-Mode PWM Step-Down DC-DC Convertor AL2010
Figure 1. AL2010 Block Diagram
Figure 2. Pin Location (Top View)
1 PWGD Power9Good 9 VIN Supply Input
2 FSYN External Synchronous Clock Input 10 SW Switching Node Output
3 PWON Power9On 11 SW Switching Node Output
4 RT Frequency Setting 12 PGND Power Ground
5 SGND Signal Ground 13 PGND Power Ground
6 SS Soft Start 14 SW Switching Node Output
7 CC Output of Feedback Amplifier 15 SW Switching N ode Output
8 FB Feedback Input 16 VIN Supply Input
[AL2010] Rev. 1.0 2011/08 9 4 9 ABSOLUTE MAXIMUM RATING (Gnd=0V; Note 1) Parameter Symbol Min Max Units VIN pin VIN −0.3 6.0 V SW pin VSW −0.3 Vin + 0.3 V All pins (Except SW pin, VIN pin) VIND −0.3 Vin V Junction Temperature TJ 125 °C Operating Ambient Temperature TA −40 85 °C Storage Ambient Temperature TSTG −40 150 °C Power Dissipation (Ta = 25 °C) Pd 2000 mW Note1. All voltages with respect to ground. WARNING: Operation at or beyond these limits may result in permanent damage to the device. Normal operation is not guaranteed at these extremes. RECOMMENDED OPERATING CONDITIONS (Gnd=0V) Parameter Symbol Min Typ Max Units VIN pin voltage Vin 3.0 − 5.5 V Output Current Iout 0 − 2.5 A Operating Ambient Temperature Ta −40 − 85 °C *AKPD assumes no responsibility for the usage beyond the conditions in this datasheet.
[AL2010] Rev. 1.0 2011/08 9 5 9
ELECTRICAL CHARACTERISTICS
(Vin=5.0V, Ta=25 °C, unless otherwise specified) Parameter Symbol Conditions Min Typ Max Units Operating Input Voltage Range Vin 3.0 9 5.5 V Feedback REF Voltage V FB_ref 591 600 609 mV Operation Current Consumption I SUULY No Switching 0.48 0.8 1.12 mA Stand9by Current Istandby Power9Off 9 9 10 µA Load Regulation *1 ∆VLOAD 9 1 9 % Rpmos PMOS R DS(ON) 10 65 100 mΩ MOSFET R DS(ON) Rnmos NMOS R DS(ON) 10 65 100 mΩ Over9Current Detection Ioclpeak 3.15 4.5 9 A Oscillator Frequency fosc 300 9 4000 kHz Fext300 RT=702kΩ (at 300kHz) 240 9 360 kHz FSYN Input Frequency Range Fext2000 RT=100kΩ (at 2MHz) 1600 9 2400 kHz Oscillator Accuracy facu RT=100kΩ (at 2MHz) 920 0 2 0 % Maximum ON Duty MAXDuty *2 9 9 100 % UVLO Vuvlo Voltage at Lock 2.30 2.50 2.84 V UVLO Return Voltage Voltage at Release 2.36 2.70 2 .90 V UVLO (Hysteresis) Vuv_hys UVLO Hysteresis Width 0.0 6 0.20 9 V Output Over Voltage Detection Vovp against V FB_ref +26 +30 +34 % Charge Current (to Capacitor of Soft Start) Iss+ Css=0V → 1.0V (at rise) 18.0 20.0 22.0 µA Discharge Current (to Capacitor of Soft Start) Thermal Protection Detection *2 9 150 9 °C Thermal Protection Hysteresis *2 9 15 9 °C Power Good Detection against V FB_ref ±16 ±20 ±24 % Power Good non9Detection against V FB_ref ±21 ±25 ±29 % Power Good Hysteresis ±3 ±5 ±7 % Power9ON Threshold Vponl 9 9 0.4 V Power9OFF Threshold Vponh 1.5 9 9 V Power9ON Hysteresis 50 100 150 mV gm (CC pin) 400 500 600 µS *1. For reference value by the recommended circuit *2. Guaranteed by design and characterization DC CHARACTERISTICS (Ta=25 °C, unless otherwise specified) Parameter Symbol Condition Min Typ Max Units VEih 0.7*VDD − − V FSYN(Input pin) Threshold Voltage VEil − − 0.3*VDD V VPoh Ipoh=9100 µA VDD90.4 − − V PWGD(Output pin) Voltage VPol Ipol=100 µA − − 0.4 V
[AL2010] Rev. 1.0 2011/08 9 7 9 PIN DISCRIPTION 1 pin_PWGD: Power9Good pin. When the output voltage achieved to ±20% of set voltage, this pin becomes “Hi”. 2 pin_FSYN: External Synchronous Clock Input pin. Internal pull 9up resistor is 300k Ω . The external clock within ±20% of relative value is available, which is to the intern al clock, and it is set by the resistor at RT pin. 3 pin_PWON: Power9ON pin. It starts in the voltage which is 1.5V and more. 4 pin_RT: The setup pin of operation frequency. It is the setup by a resistor. 5 pin_SGND: Signal Ground pin. 6 pin_SS: Soft Start pin. It should connect the capacitor of 0.047uF and more between SS pin and GND. It charges an external capacitor at the time of startup, and Soft Start works. And, when the AL2010 is in the protection state of over current, the external capacitor is discharged and it makes the stop time in a hiccup operation. 7 pin_CC: Output pin of Output Voltage Feedback Amplifier. A resistor and a capacitor are placed in a parallel connection, and those are connected between CC pin and Vref/SS pin. And those compensate a phase of an amplifier. 8 pin_FB: Input pin of Output Voltage Feedback Amplifier. The voltage is controlled so that this pin voltage beco mes 0.6V. Two resistors for the feedback should be placed in a series between the output stage and GND, and the connected point of two should be connected to FB pin. 9 pin, 16pin_VIN: Input pin of Main Power Voltage. A capacitor should be placed between VIN pin and GND, which is 4.7uF and more. 10 pin, 11 pin, 14 pin, 15 pin_SW: Output pin of the internal switching MOSFET. 12 pin, 13 pin_PGND: Power Ground pin.
Figure 5. Start Up Timing
Figure 6. Over Current Protection Timing
Figure 7. External Synchronous Timing (1) When the period of “FSYN=Hi” is longer than one cycle of Internal Clock, the operation clock is according to Internal Clock. (2) When the period of “FSYN=Hi” is shorter than one cycle of Internal Clock, the operation clock is according to External Clock. of RT pin can be inputted to AL2010.
[AL2010] Rev. 1.0 2011/08 9 12 9
PACKAGE INFORMATION
（Unit: mm ） Figure 10. Package Dimensions
[AL2010] Rev. 1.0 2011/08 9 13 9 IMPORTANT NOTICE /circle6 These products and their specifications are subject to change without notice. When you consider any use or application of these products, please make inquiries the sales office of Asahi Kasei Microdevices Corporation (AKM) or authorized distributors as to current status of the products. /circle6 Descriptions of external circuits, application circuits, software and other related information contained in this document are provided only to illustrate the operat ion and application examples of the semiconductor products. You are fully responsible for the incorpo ration of these external circuits, application circ uits, software and other related information in the design of your equipments. AKM assumes no responsibility for any losses incurred by you or third parties arising from the use of these information herein. AKM assumes no liability for infringement of any patent, intellectual property, or other rights in the application or use of such information contained herein. /circle6 Any export of these products, or devices or systems containing them, may require an export license or other official approval under the law and regulations of the country of export pertaining to customs and tar iffs, currency exchange, or strategic materials. /circle6 AKM products are neither intended nor authorized fo r use as critical components Note1) in any safety, life support, or other hazard related device or system Note2) , and AKM assumes no responsibility for such use, except for the use approved with the express written consent by Representative Director of AKM. As use d here: Note1) A critical component is one whose failure to functi on or perform may reasonably be expected to result, whether directly or indirectly, in the loss of the safety or effectiveness of the device or system containing it, and which must therefore meet very high standards of performance and reliability. Note2) A hazard related device or system is one designed or intended for life support or maintenance of safety or for applications in medicine, aerospace, nuclear energy, or other fields, in which its failure to function or perform may reasonably be expected to result in loss of life or in significant injury or damage to person or property. /circle6 It is the responsibility of the buyer or distributor of AKM products, who distributes, disposes of, or otherwise places the product with a third party, to notify such third party in advance of the above content and conditions, and the buyer or distributor agrees to assume any a nd all responsibility and liability for and hold AK M harmless from any and all claims arising from the use of said product in the absence of such notification.