AP7331 - Diodes Incorporated

1 AP7331 . 300mA, LOW QUIESCENT CURRENT, fast transient . LOW DROPOUT LINEAR REGULATOR. Description Pin Assignments The AP7331 is a 300mA, adjustable and fixed output SOT25 (Fixed Output) SOT25 (ADJ Output). voltage, low dropout linear regulator. The device included (Top View) (Top View). pass element, error amplifier, band-gap, current limit and thermal shutdown circuitry. The device is turned on when EN. IN 1 5 OUT. pin is set to logic high level. The characteristics of low dropout voltage and low quiescent GND 2. current make it suitable for low power applications, for example, battery powered devices. The typical quiescent EN 3 4 NC. current is approximately 65 A. Built-in current-limit and thermal-shutdown functions prevent DFN2020-6 (Fixed Output) DFN2020-6 (ADJ Output).

2 IC from damage in fault conditions. (Top View) (Top View). The AP7331 is available in SOT25 and DFN2020-6. EN 1 6 NC EN 1 6 ADJ. packages. GND 2 5 NC GND 2 5 NC. IN 3 4 OUT IN 3 4 OUT. Features Applications 300mA Low Dropout Regulator with EN XDSL Routers Very low IQ over full load: 65 A Wireless LAN Cards Wide input voltage range: 2V to 6V Desktop and Notebook Computers Wide adjustable output: to Battery Powered Equipments Fixed output options: to PSRR: 65dB typical at 100Hz fast start-up time: 80 s Stable with low ESR, 1 F ceramic output capacitor Excellent Load/Line transient Response Low dropout: 300mV typical at 300mA. Current limit protection Short circuit protection Thermal shutdown protection Ambient temperature range: -40 C to 85 C.

3 SOT25 and DFN2020-6: Available in Green Molding Compound (No Br, Sb). Lead Free Finish/RoHS Compliant (Note 1). Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at AP7331 1 of 13 January 2011. Document number: DS31914 Rev. 3 - 2 Diodes Incorporated AP7331 . 300mA, LOW QUIESCENT CURRENT, fast transient . LOW DROPOUT LINEAR REGULATOR. Typical Application Circuit VIN VOUT VIN VOUT. IN OUT IN OUT. AP7331 AP7331 . R1. 1uF 1uF 1uF 1uF. Enable Enable EN EN ADJ. GND GND. R2. Fixed Output Adjustable Output R . VOUT = VREF 1 + 1 . R2 . Pin Descriptions Pin Number Pin Name SOT25 DFN2020-6 SOT25 DFN2020-6 Description (fixed) (fixed) (adj) (adj).

4 Voltage input pin. Bypass to ground through at least IN 1 3 1 3. 1 F capacitor GND 2 2 2 2 Ground EN 3 1 3 1 Enable input, active high ADJ - - 4 6 Output feedback pin NC 4 5, 6 - 5 No connection Voltage output pin. Bypass to ground through 1 F. OUT 5 4 5 4. ceramic capacitor Functional Block Diagram IN OUT IN OUT. Current Limit Gate Current Limit EN Driver and Thermal EN. Gate and Thermal Shutdown R Driver Shutdown ADJ. R. GND GND. Fixed Version Adjustable Version AP7331 2 of 13 January 2011. Document number: DS31914 Rev. 3 - 2 Diodes Incorporated AP7331 . 300mA, LOW QUIESCENT CURRENT, fast transient . LOW DROPOUT LINEAR REGULATOR. Absolute Maximum Ratings Symbol Parameter Ratings Units ESD HBM Human Body Model ESD Protection 6 kV.

5 ESD MM Machine Model ESD Protection 400 V. VIN Input Voltage 7 V. EN Voltage VIN + V. Continuous Load Current Internal Limited TOP Operating Junction Temperature Range -40 ~ 125 C. TST Storage Temperature Range -65 ~150 C. SOT25 640 mW. PD Power Dissipation (Note 2). DFN2020-6 740 mW. TJ Maximum Junction Temperature 150 C. Recommended Operating Conditions Symbol Parameter Min Max Unit VIN Input voltage 2 6 V. IOUT Output Current (Note 3) 0 300 mA. TA Operating Ambient Temperature -40 85 C. Notes: 2. Ratings apply to ambient temperature at 25 C. 3. The device maintains a stable, regulated output voltage without a load current. AP7331 3 of 13 January 2011. Document number: DS31914 Rev.

6 3 - 2 Diodes Incorporated AP7331 . 300mA, LOW QUIESCENT CURRENT, fast transient . LOW DROPOUT LINEAR REGULATOR. Electrical Characteristics (TA = 25oC, VIN = VOUT +1V, CIN = 1uF, COUT = 1uF, VEN = 2V, unless otherwise stated). Symbol Parameter Test Conditions Min Typ. Max Unit VEN = VIN, IOUT = 0mA 55 75. IQ Input Quiescent Current A. VEN = VIN, IOUT = 300mA 65 85. ISHDN Input Shutdown Current VEN = 0V, IOUT = 0mA 1 A. ILEAK Input Leakage Current VEN = 0V, OUT grounded 1 A. VDropout Dropout Voltage (Note 4) IOUT = 300mA 300 550 mV. VREF ADJ Reference Voltage (Adjustable version) IOUT= 0mA V. IADJ ADJ Leakage (Adjustable version) 1 A. TA = -40oC to 85oC, VOUT Output Voltage Accuracy -2 2 %.

7 IOUT = 30mA. VOUT VIN = (VOUT +1V) to VIN-Max, Line Regulation %/V. / VIN/V VEN = VIN, IOUT = 1mA. VOUT VIN = (VOUT +1V) to VIN-Max, Load Regulation %. /VOUT IOUT from 1mA to 300mA. VEN = 0V to , VOUT = 1V, tST Start-up Time 80 s IOUT = 300mA. VIN = [VOUT +1V]VDC + , PSRR PSRR 65 dB. f = 100Hz, IOUT =30mA. VIN = VIN-Min to VIN-Max, ISHORT Short-circuit Current 100 mA. VOUT < ILIMIT Current Limit VOUT/ROUT = 1A 400 600 mA. VIL EN Input Logic Low Voltage VIN = VIN-Min to VIN-Max V. VIH EN Input Logic High Voltage VIN = VIN-Min to VIN-Max V. IEN EN Input Current VIN = 0V or VIN-Max -1 1 A. TSHDN Thermal Shutdown Threshold 140 C. THYS Thermal Shutdown Hysteresis 15 C. o SOT25 (Note 5) 190 C/W.

8 JA Thermal Resistance Junction-to-Ambient o DFN2020-6 (Note 6) 167 C/W. Notes: 4. Dropout voltage is the voltage difference between the input and the output at which the output voltage drops 2% below its nominal value. This parameter only applies to output voltages above 5. Test conditions for SOT25: Device mounted on FR-4 substrate PCB, with minimum recommended pad layout, 2oz copper, single sided 6. Test conditions for DFN2020-6: Device mounted on FR-4 substrate PCB, with minimum recommended pad layout, 2oz copper, double sided, bottom layer is a copper plane. AP7331 4 of 13 January 2011. Document number: DS31914 Rev. 3 - 2 Diodes Incorporated AP7331 . 300mA, LOW QUIESCENT CURRENT, fast transient .

9 LOW DROPOUT LINEAR REGULATOR. Typical Characteristics Quiescent Current vs Input Voltage Quiescent Current vs Input Voltage Iload=300mA Iload=0mA. 62 56. 61 VOUT = VOUT = 90 C. 54. Quiescent Current (uA). 90 C. Quiescent Current (uA). 60. 52. 59. 50. 58. 48. 57. -45 C 46. 56 25 C. C 44 25 C -45 C. 55. 42. 54. Input Voltage (V) Input Voltage (V). Reference Voltage vs Input Voltage Line Regulation (% /V). -45 C. Output Voltage Variation (%/V). VOUT = Reference Voltage (V). 90 C. VIN = VOUT +1V. 90 C. 25 C -45 C. 25 C. 0. Input Voltage (V) Input Voltage (V). Load Regulation (% ) Dropout Voltage 400. VOUT = 350 VOUT = Output Voltage Variation (%). VIN = VOUT + 1V 90 C. Dropout Voltage (mV).

10 300. 250. 0. 25 C. 200 C. 150. -45 C 25 C 100. 90 C -45 C. 50. 0. 0 50 100 150 200 250 300. 0 50 100 150 200 250 300. Output Current (mA) Output Current (mA). AP7331 5 of 13 January 2011. Document number: DS31914 Rev. 3 - 2 Diodes Incorporated AP7331 . 300mA, LOW QUIESCENT CURRENT, fast transient . LOW DROPOUT LINEAR REGULATOR. Typical Characteristics (Continued). Short Circuit vs Input Voltage Current Limit vs Input Voltage 115. 600. 110 VOUT= -45 C TA = 25 C. VOUT = Current Limit (mA). Output Current (mA). 105 550. 100. 500. 95. 90 450. 85. 25 C 90 C. C 400. 80. 4 5 6 4 6. Input Voltage (V) Input Voltage (V). PSRR PSRR. 70 70. 65 VOUT = 65 VOUT = VIN = VIN = 60 CIN = COUT = 1uF 60 CIN = COUT = 1uF.