AP7311 150mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Description Features • • • • • • • • • • • • • • • • 150mA Low Dropout Regulator with EN Very low IQ over full load: 65µA Wide input voltage range: 2V to 6V Wide adjustable output: 0.8V to 5.0V Fixed output options: 1.0V to 3.3V PSRR: 65dB at 100Hz Fast start-up time: 80µs Stable with low ESR, 1µF ceramic output capacitor Excellent Load/Line Transient Response Low dropout: 150mV typical at 150mA Current limit protection Short circuit protection Thermal shutdown protection Ambient temperature range: -40ºC to 85°C SOT25: Available in “Green” Molding Compound (No Br, Sb) Lead Free Finish/RoHS Compliant (Note 1) The AP7311 is a 150mA, adjustable and fixed output voltage, low dropout linear regulator. The device included pass element, error amplifier, band-gap, current limit and thermal shutdown circuitry. The device is turned on when EN pin is set to logic high level. The characteristics of low dropout voltage and low quiescent current make it suitable for low power applications, for example, battery powered devices. The typical quiescent current is approximately 65μA. Built-in current-limit and thermal-shutdown functions prevent IC from damage in fault conditions. The AP7311 is available in SOT25 package. Applications • • • • Notebook and Desktop Computers and Pheripherals Portable Devices Battery Powered Devices CD-ROM, DVD and LAN Cards Typical Application Circuit VIN VOUT IN VIN VOUT IN OUT AP7311 AP7311 1uF Enable OUT 1uF EN R1 1uF 1uF Enable ADJ EN GND GND Fixed Output Adjustable Output R2 ⎛ R ⎞ VOUT = VREF ⎜⎜1 + 1 ⎟⎟ R2 ⎠ ⎝ AP7311 Rev. 2 1 of 13 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AP7311 150mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Ordering Information AP7311 - XX XX G - 7 Output Package Blank : ADJ 10 : 1.0V 12 : 1.2V 15 : 1.5V 18 : 1.8V 20 : 2.0V 25 : 2.5V 28 : 2.8V 30 : 3.0V 33 : 3.3V Device AP7311-XXWG-7 Notes: W : SOT25 Package Code W Packaging (Note 2) SOT25 Green Packing G : Green 7 : Tape & Reel 7” Tape and Reel Quantity Part Number Suffix 3000/Tape & Reel -7 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 on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. AP7311 Rev. 2 2 of 13 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AP7311 150mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Pin Assignment (1) SOT25 (Fixed Output) (2) SOT25 (Adj Output) ( Top View ) ( Top View ) IN 1 5 OUT GND 2 IN 1 5 OUT GND 2 4 NC EN 3 EN 3 4 ADJ Pin Descriptions Pin Name IN GND EN ADJ NC OUT AP7311 Rev. 2 Pin Number SOT25 SOT25 (fixed) (adj) 1 1 2 2 3 3 4 4 5 5 Description Voltage input pin. Bypass to ground through at least 1µF capacitor Ground Enable input, active high Output feedback pin No connection Voltage output pin. Bypass to ground through 1µF ceramic capacitor 3 of 13 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AP7311 150mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Functional Block Diagram OUT IN Gate Driver EN Current Limit and Thermal Shutdown OUT IN EN R Gate Driver Current Limit and Thermal Shutdown ADJ 0.4V 0.4V R GND GND Adjustable Version Fixed Version Absolute Maximum Ratings Symbol ESD HBM ESD MM VIN TOP TST PD TJ Parameter Human Body Model ESD Protection Machine Model ESD Protection Input Voltage EN Voltage Continuous Load Current Operating Junction Temperature Range Storage Temperature Range Power Dissipation (Note 3) Maximum Junction Temperature SOT25 Ratings 6 400 7 VIN + 0.3 Internal Limited -40 ~ 125 -65 ~150 640 150 Units kV V V V °C °C mW °C Recommended Operating Conditions Symbol VIN IOUT TA Notes: Parameter Input voltage Output Current (Note 4) Operating Ambient Temperature Min 2 0 -40 Max 6 150 85 Unit V mA °C 3. Ratings apply to ambient temperature at 25°C 4. The device maintains a stable, regulated output voltage without a load current. AP7311 Rev. 2 4 of 13 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AP7311 150mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Electrical Characteristics o (TA = 25 C, VIN = VOUT +1V, CIN = 1uF, COUT = 1uF, VEN = 2V, unless otherwise stated) Symbol Parameter Input Quiescent Current IQ ISHDN ILEAK VDropout VREF Input Shutdown Current Input Leakage Current Dropout Voltage (Note 5) ADJ Reference Voltage (Adjustable version) IADJ ADJ Leakage (Adjustable version) VOUT Output Voltage Accuracy ΔVOUT Line Regulation /ΔVIN/V ΔVOUT Load Regulation /VOUT Start-up Time tST PSRR PSRR ISHORT Short-circuit Current ILIMIT Current Limit VIL VIH IEN TSHDN THYS EN Input Logic Low Voltage EN Input Logic High Voltage EN Input Current Thermal Shutdown Threshold Thermal Shutdown Hysteresis Thermal Resistance Junction-to-Ambient θJA Notes: Test Conditions VEN = VIN, IOUT = 0mA VEN = VIN, IOUT = 150mA VEN = 0V, IOUT = 0mA VEN = 0V, OUT grounded IOUT = 150mA IOUT= 0mA Min Typ. Max Unit 55 75 ⎯ μA 65 85 μA 1 ⎯ μA 1 ⎯ 150 300 mV 0.4 V 1 μA ⎯ TA = -40oC to 85oC, -2 2 % IOUT = 30mA VIN = (VOUT +1V) to VIN-Max, 0.01 0.20 %/V VEN = VIN, IOUT = 1mA VIN = (VOUT +1V) to VIN-Max, -0.6 0.6 % IOUT from 1mA to 150mA VEN = 0V to 2.0V, VOUT = 1.8V 80 μs IOUT = 150mA VIN = [VOUT +1V]VDC + 0.5VppAC, 65 dB f = 100Hz, IOUT = 30mA VIN = VIN-Min to VIN-Max, VOUT < 0.2V 50 mA VIN = (VOUT +1V) to VIN-Max, 200 300 mA VOUT/ROUT = 0.5A VIN = VIN-Min to VIN-Max 0.4 V VIN = VIN-Min to VIN-Max 1.4 V VIN = 0V or VIN-Max -1 1 μA 140 °C 15 °C SOT25 (Note 6) 190 o C/W 5. 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 1.8V. 6. Test conditions for SOT25: Device mounted on FR-4 substrate PCB, with minimum recommended pad layout, 2oz copper, single sided AP7311 Rev. 2 5 of 13 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AP7311 150mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Typical Performance Characteristics Quiescent Current vs Input Voltage Iload=150mA Quiescent Current vs Input Voltage Iload=0mA 60 60 Vout=1.8V 90℃ 52 48 25℃ 56 Quiescent Current (uA) Quiescent Current (uA) Vout=1.8V 56 -45℃ 44 90℃ 52 48 44 25℃ 40 2.8 3.2 3.6 4 4.4 4.8 5.2 5.6 2.8 6 3.2 3.6 4 Reference Voltage vs Input Voltage 4.8 5.2 5.6 5.2 5.6 6 Line Regulation (%/V) 0.41 0.06 Output Voltage Variation (%) Reference Voltage (V) 4.4 Input Voltage (V) Input Voltage (V) -45℃ 0.405 0.4 25℃ 0.395 90℃ Vout=1.8V Vin=Vout +1V 0.05 90℃ 0.04 25℃ 0.03 0.02 -45℃ 0.01 0 0.39 2 2.5 3 3.5 4 4.5 5 5.5 2.8 6 3.2 3.6 4 Input Voltage (V) 4.4 4.8 6 Input Voltage (V) Dropout Voltage Load Regulation (%) 2.4 200 Vout=1.8V Vin=Vout +1V 2 Vout=2.5V -45℃ 90℃ 160 Dropout Voltage (mV) Output Voltage Variation (%) -45℃ 40 1.6 90℃ 1.2 0.8 25℃ 0.4 25℃ 120 80 -45℃ 40 0 0 -0.4 0 30 60 90 120 150 Output Current (mA) AP7311 Rev. 2 0 25 50 75 100 125 150 Output Current (mA) 6 of 13 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AP7311 150mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Typical Performance Characteristics (Continued) Current Limit vs Input Voltage Short Circuit vs Input Voltage 55 360 50 45 40 25℃ Vout=0.8V Ta=25℃ 350 -45℃ Current Limit (mA) Output Current (mA) Vout=1.8V 90℃ 340 330 320 310 300 290 280 35 2.8 3.2 3.6 4 4.4 4.8 5.2 5.6 2 6 2.4 2.8 3.2 PSRR 4 4.4 4.8 5.2 5.6 6 PSRR 80 80 75 75 Vout=0.8V Vin=5V Cin=Cout=1uF Ta=25℃ 65 60 Vout=1.8V Vin=2.8V Cin=Cout=1uF Ta=25℃ 70 65 PSRR (dB) 70 PSRR (dB) 3.6 Input Voltage (V) Input Voltage (V) 55 50 60 55 50 45 45 40 40 35 35 0.1 1 10 100 Frequency (kHz) AP7311 Rev. 2 0.1 1 10 100 Frequency (kHz) 7 of 13 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AP7311 150mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Typical Performance Characteristics (Continued) Start-Up Time (150mA Load) Start-Up Time (No Load) Ven=0 to 2V (1V/div) Vin=2.8V Cin=Cout=1uF Ven=0 to 2V (1V/div) Vin=2.8V Cin=Cout=1uF Vout=1.8V (1V/div) Vout=1.8V (1V/div) Iout=150mA (150mA/div) Time (50us/div) Time (50us/div) Line Transient Response Line Transient Response Vin=2.8V to 3.8V (1V/div) Tr=15us Vin=3.8V to 2.8V (1V/div) Tf=15us Vout=1.8V (50mV/div) Vout=1.8V (50mV/div) Iout=150mA (150mA/div) Iout=150mA (150mA/div) Time (50us/div) AP7311 Rev. 2 Time (50us/div) 8 of 13 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AP7311 150mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Typical Performance Characteristics (Continued) Load Transient Response Load Transient Response Tr=Tf=15us Vin=2.8V Vout=1.8V (100mV/div) Tr=Tf=15us Vin=6V Iout=1mA to 150mA (50mA/div) Iout=1mA to 150mA (50mA/div) Time (50us/div) AP7311 Rev. 2 Vout=5.0V (100mV/div) Time (50us/div) 9 of 13 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AP7311 150mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Application Note Characteristics section under VIL and VIH. Input Capacitor A 1μF ceramic capacitor is recommended to connect between VIN and GND pins to decouple input power supply glitch and noise. The amount of the capacitance may be increased without limit. This input capacitor must be located as close as possible to the device to assure input stability and less noise. For PCB layout, a wide copper trace is required for both VIN and GND. A lower ESR capacitor allows the use of less capacitance, while higher ESR type requires more capacitance. Output Capacitor The output capacitor is required to stabilize and help transient response for LDO. The AP7311 is stable with very small ceramic output capacitors. The recommended capacitance is from 1μF to 4.7μF, Equivalent Series Resistance (ESR) is from 10mΩ to 200mΩ, and temperature characteristic is X7R or X5R. Higher capacitance values help to improve load/line transient response. The output capacitance may be increased to keep low undershoot/overshoot. Place output capacitor as close as possible to OUT and GND pins, and keep the leads as short as possible. Adjustable Operation The AP7311 provides output voltage from 0.8V to 5.0V through external resistor divider as shown below. V IN V OUT IN E n ab le R1 1uF ADJ EN GND When output current at OUT pin is higher than current limit threshold, the current limit protection will be triggered and clamp the output current to approximately 300mA to prevent over-current and to protect the regulator from damage due to overheating. Short Circuit Protection When OUT pin is short-circuit to GND or OUT pin voltage is less than 200mV, short circuit protection will be triggered and clamp the output current to approximately 50mA. This feature protects the regulator from over-current and damage due to overheating. Thermal Shutdown Protection Thermal protection disables the output when the junction temperature rises to approximately +140°C, allowing the device to cool down. When the junction temperature reduces to approximately +125°C the output circuitry is enabled again. Depending on power dissipation, thermal resistance, and ambient temperature, the thermal protection circuit may cycle on and off. This cycling limits the heat dissipation of the regulator, protecting it from damage due to overheating. Ultra Fast Start-up After enabled, the AP7311 is able to provide full power in as little as tens of microseconds, typically 80µs, without sacrificing low ground current. This feature will help load circuitry move in and out of standby mode in real time, eventually extend battery life for mobile phones and other portable devices. OUT A P 73 31 1 uF Current Limit Protection R2 Fast Transient Response The output voltage is calculated by: ⎛ R ⎞ VOUT = VREF ⎜⎜1 + 1 ⎟⎟ ⎝ R2 ⎠ Where VREF=0.4V (the internal reference voltage) Rearranging the equation will give the following that is used for adjusting the output to a particular voltage: ⎛V ⎞ R 1 = R 2 ⎜⎜ OUT − 1⎟⎟ ⎝ VREF ⎠ Fast transient response LDOs can extend battery life. TDMA-based cell phone protocols such as Global System for Mobile Communications (GSM) have a transmit/receive duty factor of only 12.5 percent, enabling power savings by putting much of the baseband circuitry into standby mode in between transmit cycles. In baseband circuits, the load often transitions virtually instantaneously from 100µA to 100mA. To meet this load requirement, the LDO must react very quickly without a large voltage drop or overshoot — a requirement that cannot be met with conventional, general-purpose LDOs. The AP7311’s fast transient response from 0 to 150mA provides stable voltage supply for fast DSP and GSM chipset with fast changing load. Small Overshoot and Undershoot To maintain the stability of the internal reference voltage, R2 need to be kept smaller than 125kΩ. No Load Stability Other than external resistor divider, no minimum load is required to keep the device stable. The device will remain stable and regulated in no load condition. ON/OFF Input Operation The AP7311 is turned on by setting the EN pin high, and is turned off by pulling it low. If this feature is not used, the EN pin should be tied to IN pin to keep the regulator output on at all time. To ensure proper operation, the signal source used to drive the EN pin must be able to swing above and below the specified turn-on/off voltage thresholds listed in the Electrical AP7311 Rev. 2 The AP7311 has small and controlled overshoot and undershoot in load and line transitions. This helps to protect supplied circuit from damage and operation error caused by glitches. This feature also permits the usage of small value output decoupling capacitor with AP7311. Low Quiescent Current The AP7311, consuming only around 65µA for all input range and output loading, provides great power saving in portable and low power applications. Wide Output Range The AP7311, with a wide output range of 0.8V to 5.0V, provides a versatile LDO solution for many portable applications. 10 of 13 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AP7311 150mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Marking Information (1) SOT25 ( Top View ) 4 7 5 XX Y W X 1 AP7311 Rev. 2 2 3 XX : Identification code Y : Year 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : A~Z : Green Device Package Identification Code AP7311-ADJ SOT25 RM AP7311-10 SOT25 RN AP7311-12 SOT25 RP AP7311-15 SOT25 RR AP7311-18 SOT25 RS AP7311-20 SOT25 RT AP7311-25 SOT25 RU AP7311-28 SOT25 RV AP7311-30 SOT25 RW AP7311-33 SOT25 RX 11 of 13 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AP7311 150mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator Package Information (All Dimensions in mm) (1) Package Type: SOT25 AP7311 Rev. 2 12 of 13 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AP7311 150mA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator 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 under its patent or trademark rights, nor the rights of others. Any Customer or user of this 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 Diodes 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 out 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 names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express 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 in 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 devices 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 Incorporated. 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 © 2009, Diodes Incorporated www.diodes.com AP7311 Rev. 2 13 of 13 www.diodes.com NOVEMBER 2009 © Diodes Incorporated