A7801A

A7801A AITSEMI | Alldatasheet

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AiT Semiconductor Inc. www.ait-ic.com A7801A DC-DC CONVERTER 300KHz LOW NOISE, REGULATED CHARGE PUMP REV1.0 - JAN 2017 RELEASED - - 1 - DESCRIPTION FEATURES The A7801A is a low noise, constant frequency (300kHz) switched capacitor voltage doubler. It produce a regulated output voltage from a 2.5V to 5.0V input with up to 300mA of output current. Low external parts count (one flying capacitor and two small bypass capacitors at V IN and VOUT) make the A7801A ideally suited for small, battery -powered applications. A new charge-pump architecture maintains constant switching frequency to zero load and reduces both output and input ripple. The A7801 A have thermal shutdown capability and can survive a continuous short circuit from V OUT to GND. Built -in soft -start circuitry prevents excessive inrush current during start-up. High switching frequency enables the use of small ceramic capacitors. A low current shutdown feature disconnects the load from V IN and reduces quiescent current to <1uA. The A7801A is available in SOT-26 package.

ORDERING INFORMATION

SPQ: 3,000pcs/Reel A7801AE6R A7801AE6VR Note V: Halogen free Package R: Tape & Reel AiT provides all RoHS products ⚫ Fixed 5V ± 2.5% Output ⚫ VIN Range: 2.5V to 5.0V ⚫ Output Current: Up to 300mA ⚫ Constant Frequency Operation at All Loads ⚫ Low Noise Constant Frequency (300kHz) Operation ⚫ Automatic Soft-Start Reduces Inrush Current ⚫ Shutdown Current <1uA ⚫ Short-Circuit Protection ⚫ No Inductors ⚫ Available in SOT-26 package APPLICATION ⚫ White LED Backlighting ⚫ Li-Ion Battery Backup Supplies ⚫ Local 3V to 5V Conversion ⚫ Smart Card Readers ⚫ PCMCIA Local 5V Supplies TYPICAL APPLICATION Figure 1. Basic Application Circuit with A7801A

AiT Semiconductor Inc. www.ait-ic.com A7801A DC-DC CONVERTER 300KHz LOW NOISE, REGULATED CHARGE PUMP REV1.0 - JAN 2017 RELEASED - - 2 - PIN DESCRIPTION Top View Pin # Symbol Function

1 VOUT

Regulated Output Voltage. V OUT should be bypassed with a low ESR ceramic capacitor providing at least 2.2uF of capacitance as close to the pin as possible for best performance. 2 GND Ground Pin. 3 EN Active Low Shutdown Input. This pin must not be allowed to float. 4 C- Flying Capacitor Negative Terminal.

5 VIN

Input Supply Voltage. VIN should be bypassed with a low ESR ceramic capacitor providing at least 2.2uF of capacitance as close to the pin as possible for best performance. 6 C+ Flying Capacitor Positive Terminal.

AiT Semiconductor Inc. www.ait-ic.com A7801A DC-DC CONVERTER 300KHz LOW NOISE, REGULATED CHARGE PUMP REV1.0 - JAN 2017 RELEASED - - 3 - ABSOLUTE MAXIMUM RATINGS VIN -0.3V~+6V VOUT -0.3V~5.5V VEN -0.3V~+6V IOUT NOTE1 350mA PD, Power Dissipation SOT-26 300mW Operating Temperature Range NOTE2 -20°C~85°C Lead Temperature (Soldering 10 sec.) 300°C Storage Temperature Range -65°C~125°C Stress beyond above listed “Absolute Maximum Ratings” may lead permanent damage to the device. These are stress ratings only and operations of the device at these or any other conditions beyond those indicated in the operational sections of the specifications are not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. NOTE 1: Based on long term current density limitations. NOTE 2: The A7801A are guaranteed to meet performance specifications from 0℃ to 70℃ Specifications over the –20℃ to 85 operating temperature range are assured by design, characterization and correlation with statistical process controls.

ELECTRICAL CHARACTERISTICS

EN= VIN, CIN=COUT=10uF, TA = 25°C, Test Circuit of Figure 1, unless otherwise noted. Parameter Symbol Conditions Min. Typ. Max. Unit Input Voltage Range VIN 2.5 - 5.0 V Output Voltage Range VOUT VIN> 3.0V, IOUT < 40mA 4.875 5.0 5.125 V Shutdown Current ISHDN EN=0V, ILOAD=0mA - - 1 μA Line Regulation VLINE 3.1<VIN<4.5, ILOAD = 50mA - 10 - mV Output Current Limit ILIMIT - 300 - mA Output Ripple VR VIN = 3.6V, IOUT = 100mA - 50 - mVP-P Efficiency η VIN = 3.6V, IOUT = 50mA - 68 - % Switching Frequency fOSC - 300 - kHz

AiT Semiconductor Inc. www.ait-ic.com A7801A DC-DC CONVERTER 300KHz LOW NOISE, REGULATED CHARGE PUMP REV1.0 - JAN 2017 RELEASED - - 4 - BLOCK DIAGRAM

AiT Semiconductor Inc. www.ait-ic.com A7801A DC-DC CONVERTER 300KHz LOW NOISE, REGULATED CHARGE PUMP REV1.0 - JAN 2017 RELEASED - - 5 -

PACKAGE INFORMATION

Dimension in SOT-26 (Unit: mm) Symbol Min Max A 1.050 1.250 A1 0.000 0.100 A2 1.050 1.150 b 0.300 0.500 c 0.100 0.200 D 2.820 3.020 E 1.500 1.700 E1 2.650 2.950 e 0.950 BSC e1 1.800 2.000 L 0.300 0.600 θ 0° 8°

AiT Semiconductor Inc. www.ait-ic.com A7801A DC-DC CONVERTER 300KHz LOW NOISE, REGULATED CHARGE PUMP REV1.0 - JAN 2017 RELEASED - - 6 - IMPORTANT NOTICE AiT Semiconductor Inc. (AiT) reserves the right to make changes to any its product, specifications, to discontinue any integrated circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verif y, before placing orders, that the information being relied on is current. AiT Semiconductor Inc. 's integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in life support applications, devices or systems or other critical applications. Use of AiT products in such applications is understood to be fully at the risk of the customer. As used herein may involve potential risks of death, personal injury, or servere property, or environmental damage. In order to mi nimize risks associated with the customer's applications, the customer should provide adequate design and operating safeguards. AiT Semiconductor Inc. assumes to no liability to customer product design or application support. AiT warrants the performance of its products of the specifications applicable at the time of sale.