MD7671E33PA1

5V-Adjustable High-PSRR Low-Noise LDO MD7671 Series CMOS Voltage Regulator With ON/OFF Switch PRODUCT DESCRIPTION MD7671 highly 1A FEATURES series are ⚫ Highly Accurate: ±2％ accurate, low- ⚫ Low Quiescent Current: 40µA noise, high power supply ⚫ Dropout Voltage: 160mV@3.3V/1A rejection ratio (PSRR), ⚫ Maximum Output Current: 1A low-dropout voltage ⚫ Input Voltage Range: 2~6V regulator (LDO) with high output current capability ⚫ Output Voltage Noise: 115μVrms@VOUT=3.3V manufactured in CMOS processes. It can deliver up ⚫ High PSRR:70dB@1kHz to 1A of current while consuming 40µA of quiescent ⚫ Temperature Stability: ±50ppm/℃ current. Internal circuitry includes a reference ⚫ ON/OFF Logic = Enable High voltage generator, an error amplifier, driver transistor, ⚫ Power Good and Enable Functions over-current short-circuit ⚫ Standby Current: 10nA protection circuit, thermal shutdown circuit and a ⚫ COUT Discharge Circuit when EN Disable is Active phase compensation circuit. The MD7671 operates ⚫ Protections Circuits: Current Limit, Short Circuit, protection circuit, by default as a fixed output voltage regulator (default and Thermal Protections output voltage: 5V) while usage of an external ⚫ resistor divider allows adjustable out voltages as low Output Capacitor: Low ESR Ceramic Capacitor Compatible as 0.7V. Additional features include enable function, ⚫ power good flag and output noise reduction pin. RoHS compliant “Green”/Halogen Free 8-pin Exposed pad SOIC (ESOP8) packages, TO252-4, SOT89-3 and SOT23-5 packages APPLICATIONS ⚫ Smart wearer ⚫ Long-life battery-powered devices ⚫ Portable mobile devices, such as mobile phones, cameras, and so on ⚫ Wireless communication equipment TYPICAL APPLICATION CIRCUIT: 10k R3 ADJ VOUT 3.3V/1A VIN VOUT EN ADJ GND BP GND MD7671A COUT 4.7μF CIN 4.7μF Enable GND MD7671B R1 R1 PGOOD 390k 390k R2 4.7μF PGOOD EN VIN 3.6V - 6V 105k CIN VOUT R2 Enable VOUT 3.3V/1A VIN 105k VIN 3.6V - 6V COUT 4.7μF MD7671 Series 1A 5V-Adjustable Low Dropout Voltage Regulator PIN CONFIGURATION (TOP VIEW) MD7671B MD7671A EN 1 VIN 2 8 GND 7 PGOOD VOUT 1 ADJ 2 GND VOUT 3 ADJ 4 VOUT 8 VIN 7 N.C. 6 N.C. 5 EN SOT23-5 4 GND 6 BP GND 3 5 GND N.C. 4 ESOP8 ESOP8 7671 1 2 3 VIN GND EN SOT89-3 SOT89-3 2 MD7671 GND 3 2 7671EXX ADJ/NC 5 7671 7671AXX 3 1 2 3 1 2 VOUT GND VIN GND VIN 1 3 2 EN VIN VOUT 4 5 VOUT ADJ TO252-4L PRODUCT SELECTIONS Type Fixed Output Voltage（note 1*） ADJ Accuracy （note 2*） Package （note 3*） MARKING (note 4*） MD7671A50SF4 5V Yes ±2% ESOP8 7671A MD7671B50SF4 5V Yes ±2% ESOP8 7671B MD7671E50QC3 5V Yes ±2% SOT23-5 7671 MD7671E33PA1 3.3V No ±2% SOT89-3 7671E33 MD7671A33PA1 3.3V No ±2% SOT89-3 7671A33 MD7671E50UB2 5V Yes ±2% TO252-4L 7671 Notes: 1* Customer can request to customize the output voltage ranged from 1.2V to 5V if desired voltage is not found in the selections. 2* Customer can request customization of accuracy requirement. 3* Customer can request customization of package choice. 4* Please pay attention to the MARKING of the product package type. 2 / 14 MD7671 Series 1A 5V-Adjustable Low Dropout Voltage Regulator PIN DESCRIPTION VOUT ESOP8 (MD7671A) 3 ESOP8 (MD7671B) 1 SOT23-5 (MD7671EXX) 5 ADJ 4 2 - GND 5,8 3 2 EN 1 5 3 VIN 2 8 1 BP 6 - - PGOOD 7 - - N.C. - 4,6,7 - GND Exposed Pad Exposed Pad - Name Description Regulator Output pin. Adjustable Pin. Output Voltage can be set by external feedback resistors when using a resistive divider. Or, connect ADJ to GND for VOUT = 5V, set by internal feedback resistors. Ground Signal Enable Pin. Minimum 1.6V to enable the device. Maximum 0.4V to shutdown the device. Power Input Pin. Must be closely decoupled to GND pin with a 4.7μF or greater ceramic capacitor. Bypass pin. Connect a 1μF capacitor to GND to reduce output noise. Bypass pin can be left floating if unnecessary. Power Good open Drain Output Non Connection (Used to connect GND or OPEN state.) Connect to GND. ABSOLUTE MAXIMUM RATINGS PARAMETER Input Voltage Output Voltage Power Dissipation Thermal Resistance Operating Ambient Temperature Storage Temperature ESD Protection SYMBOL VIN VOUT PD RθJB(1) Topr Tstg ESD HBM (Unless otherwise indicated: Ta=25℃) RATINGS UNITS -0.3 ~ 7 V -0.3 ~ VIN+0.3 Internally Limited ESOP8 80 SOT23-5 180 ℃/W SOT89-3 100 TO252-4 60 -40 ~ +85 ℃ -40 ~ +125 4000 V Note: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. (1) Mounted on JEDEC standard 4layer (2s2p) PCB test board 3 / 14 MD7671 Series 1A 5V-Adjustable Low Dropout Voltage Regulator ELECTRICAL CHARACTERISTICS Unless otherwise indicated, VIN = VOUT + 1V, CIN = 4.7µF, COUT = 4.7µF, CBYP=1µF, TJ = 25°C. PARAMETER Input Voltage Output Voltage Tolerance Continuous Output Current SYMBOL VIN VOUT(S) IOUT 15 mV VIN=VEN=VOUT(S)+1.0V 1mA≤IOUT≤1A 10 20 mV VIN=VEN =VOUT(S)+1.0V ΔVOUT IOUT=1mA 𝛥𝑇𝑎 • 𝑉𝑂𝑈𝑇(𝑠) -40℃≤TA≤125℃ ±50 Dropout Voltage*2 VDROP Line Regulation VOUT2 VEN=VIN, IOUT=1A, VOUT=1.8V VEN=VIN, IOUT=1A, VOUT=3.3V VEN=VIN, IOUT=1A, VOUT=5V VOUT(S)+1V≤VIN=VEN≤6V IOUT=1mA Reference Voltage Tolerance 0.686 VADJ = VREF Output ON Output OFF 0.05 1.6 μA μA A ppm/ ℃ 0.7 0.714 10 0.1 0.2 0.1 0 0.4 0.5 V nA V V V μA μs 30 Ω 90 10 1 0.05 70 68 47 55 % % ms V 115 µVRMS TSD 175 ℃ TSD_HYS 35 ℃ PGHTH PGHYS PGDLY Power Supply Ripple Rejection PSRR Output Noise Voltage VOUTN Thermal Shutdown Hysteresis UNIT V % A 3 ISHUT ILIM Thermal Shutdown Temperature MAX. 6 +2 mV Shutdown Current Output Current Limit Current Fold Back ADJ Pin Current ADJ Pin Threshold Enable Turn-On Threshold Enable Turn-Off Threshold Shutdown Pin Current Shutdown Exit Delay Time Max Output Discharge Resistance to GND during Shutdown PGOOD Rise Threshold PGOOD Hysteresis PGOOD Delay PGOOD Sink Capability TYP. 300 250 240 IGND Temperature Stability IOUT=1mA VIN>2.1V VEN=VIN, no load VEN=VIN, IOUT=100mA VEN=0 MIN. 2 -2 1 40 390 0.01 1.4 0.4 210 160 150 Ground Current Load Regulation CONDITIONS IPGOOD = 10mA f=1kHz, IOUT=10mA f=10kHz, IOUT=10mA f=100kHz, IOUT=10mA f=1MHz, IOUT=10mA CBP = 1µF, VOUT=3.3V f=10Hz ~100KHz Notes： 1. VOUT(S): Output voltage when VIN=VOUT+1V, IOUT=1 mA. 2. VDROP=VIN1 -（VOUT(S)× 0.98）where VIN1 is the input voltage when VOUT = VOUT(S)× 0.98. 3. ILIM: Output current when VIN=VOUT(S)+1V and VOUT = 0.95*VOUT(S). 4 / 14 dB MD7671 Series 1A 5V-Adjustable Low Dropout Voltage Regulator TYPICAL PERFORMANCE CHARACTERISTICS Test Conditions: VIN=VOUT+1.0V, CIN = 4.7μF, COUT = 4.7μF, TA=25℃, unless otherwise indicated. 3.6 80 GND Current IGND(μA) Output Voltage VOUT(V) 3.5 3.4 3.3 3.2 60 40 20 3.1 IOUT =1mA 3 -40 -20 0 20 40 60 80 100 120 0 140 -40 -20 0 Junction Temperature Ta(℃) 40 60 80 100 120 140 GND Current vs. Temperature at VOUT=3.3V 140 3.5 120 3 Output Voltage VOUT(V) GND Current IGND(uA) Output Voltage vs. Temperature at VOUT=3.3V 100 80 60 40 2.5 2 1.5 1 0.5 20 0 0 0 1 2 3 4 5 0 6 1 2 3 4 5 6 Input Voltage VIN(V) Input Voltage VIN(V) Output Voltage vs Input Voltage at VOUT=3.3V GND Current vs. Input Voltage at VOUT=3.3V 3.36 1600 1400 3.34 1200 Output Voltage VOUT(V) GND Current IGND(uA) 20 Input Voltage VIN(V) 1000 800 600 400 3.32 3.3 3.28 3.26 200 3.24 0 0 0.2 0.4 0.6 0.8 0 1 0.2 0.4 0.6 0.8 Output Current IOUT(A) Output Current IOUT(A) Output Voltage vs Output Current at VOUT=3.3V GND Current vs Output Current at VOUT=3.3V 5 / 14 1 MD7671 Series 1A 5V-Adjustable Low Dropout Voltage Regulator TYPICAL PERFORMANCE CHARACTERISTICS(CONTINUTED) 200 90 180 80 160 -40° 140 25° 120 85° Ripple Rejection Rate RR(dB) Dropout Voltage VDROP(mV) Test Conditions: VIN=VOUT+1.0V, CIN=4.7μF, COUT= 4.7μF, TA=25℃, unless otherwise indicated. 100 80 60 40 20 0 0 0.2 0.4 0.6 0.8 70 60 50 40 30 20 VIN=4.3V DC+200mVPP AC IOUT =10mA 10 0 0.01 1 0.1 Output Current IOUT(A) 1 10 100 1000 Ripple Frequencey f (kHz) Dropout Voltage vs. Output Current at VOUT=3.3V Power Supply Rejection Ratio at VOUT=3.3V Ch1=VOUT Ch1=VOUT Offset=4.3V Ch4=IOUT Load Transient at VOUT=3.3V (IOUT=10mA~1A~10mA) Ch2=VIN Line Transient at VOUT=3.3V (IOUT=10mA) Ch1=VOUT Ch1=VOUT Ch2=EN Ch2=EN Ch3=PGOOD Ch3=PGOOD Enable Startup at VOUT=3.3V (IOUT=0mA) Enable Shutdown at VOUT=3.3V (IOUT=0mA) 6 / 14 MD7671 Series 1A 5V-Adjustable Low Dropout Voltage Regulator TYPICAL PERFORMANCE CHARACTERISTICS(CONTINUTED) Test Conditions: VIN=VOUT+1.0V, CIN=4.7μF, COUT= 4.7μF, TA=25℃, unless otherwise indicated. Ch4=IOUT Output Current Fold-back at VOUT=3.3V 7 / 14 MD7671 Series 1A 5V-Adjustable Low Dropout Voltage Regulator BLOCK DIAGRAM VIN Reference Buffer BP Error AMP Soft-Start VOUT Thermal Shutdown EN Current Limit Enable/Shutdown Logic GND ADJ Selector PGOOD 0.63V 0.1V ADJ THEORY OF OPERATION The MD7671 is a low-dropout voltage regulator with low quiescent current, low noise and high PSRR. It can support load current up to 1A. It incorporates current-limit and thermal protection features. SHUTDOWN By connecting EN pin to GND, the MD7671 can be shutdown to reduce the supply current to 0.01μA (typ.). In this mode, the output voltage of MD7671 is equal to 0V. CURRENT LIMIT and SHORT CIRCUIT PROTECTION The MD7671 includes current limit protection feature, which monitors and controls the maximum output current. If the output is overloaded or shorted to ground, this can protect the device from being damaged. When output is shorted to ground, current limit will be adjusted to about 25% of the rated current limit to protect the device. THERMAL PROTECTION The MD7671 includes a thermal protection feature that protects the IC by turning off the pass transistor when the maximum junction temperature TJ exceed 175℃. POWER DISSIPATION The power dissipation across the device can be calculated as: PD = IOUT ∗ (VIN − VOUT ) The total junction temperature is calculated as: TJ = TA + (PD ∗ θJA) where, TJ is the junction temperature, TA is the ambient temperature and θJA is the thermal resistance between junction to ambient. There is a temperature rise associated with this power dissipated while operating in a given ambient temperature. If the calculated junction temperature exceeds maximum junction temperature specification, then the built-in thermal protection feature is triggered as described previously. To insure reliable performance, the maximum allowable power dissipation for a given ambient temperature must be considered and it can be calculated as follows: PD(MAX) = (TJ(MAX) − TA )⁄θJA 8 / 14 MD7671 Series 1A 5V-Adjustable Low Dropout Voltage Regulator where, TJ(MAX) is the maximum junction temperature, TA is the ambient temperature and θJA is the thermal resistance between junction to ambient. In order to insure the best thermal flow, proper mounting of the IC is required. INPUT & OUTPUT CAPACITORS MD7671 is optimized for use with ceramic capacitors. In order to ensure stability of the device, please place an output ceramic capacitor of 4.7µF or bigger at the VOUT pin and GND pin as close as possible. An input capacitor of 4.7µF is recommended. X5R or X7R ceramic capacitors are recommended as they have the best temperature and voltage characteristics. If the impedance of the power supply is high, which is caused by forgetting installing input capacitor or installing too small value capacitor, the oscillation may occur. When large output current switching (>500mA) are required in the application, a greater value of input/output capacitors (≥10 µF) would be recommended to ensure the device to operate smoothly. TYPICAL APPLICATION SCHEMATIC 10k R3 VOUT EN ADJ R1 PGOOD GND BP GND COUT CIN 4.7μF 4.7μF Enable GND MD7671A MD7671B R1 390k R2 4.7μF ADJ VOUT 3.3V/1A VIN 390k PGOOD EN VIN 3.6V-6V 105k CIN VOUT R2 Enable VOUT 3.3V/1A VIN 105k VIN 3.6V-6V COUT 4.7μF PROGRAMMING THE OUTPUT VOLTAGE MD7671’s internal feedback resistors set the output voltage VOUT to 5V when the ADJ pin is connected to GND. Alternatively; the output voltage is adjustable via the external feedback resistor network R1 and R2 by calculating the following formula: VOUT = VREF ∗ (1 + R1 ) R2 where, VREF is the reference voltage set internally at 0.7V nominal. NOISE BYPASS CAPACITOR (For MD7671A) A 1µF bypass capacitor at BP pin can reduce output voltage noise. This pin can be left floating if it is unnecessary. POWER-GOOD FUNCTION The power-good circuit monitors the voltage at the feedback pin to indicate the status of the output voltage. When the output voltage falls below the PGOOD fall threshold voltage (PGLTH), the PGOOD pin open-drain output engages and pulls the PGOOD pin close to GND. When the output voltage exceeds PGOOD rise threshold voltage (PGHTH), the PGOOD pin becomes high impedance. By connecting a pullup resistor to external pullup supply voltage (default for VOUT), any downstream device can receive power-good as a logic signal that can be used for sequencing. Make sure that the external pullup supply voltage results in a valid logic signal for the receiving device. Using a pullup resistor from10 kΩ to 100 kΩ is recommended. LAYOUT CONSIDERATION 1. Connect the bottom-side pad to a large ground plane for good thermal conductivity and to reduce the thermal resistance of the device. 2. The input Capacitor CIN and output capacitor COUT must be placed as close as possible to the pins VIN and VOUT respectively. 3. Use short wires to connect the power supply to pins VIN and GND on the board. 9 / 14 MD7671 Series 1A 5V-Adjustable Low Dropout Voltage Regulator Notes on Use 1. The input capacitor (CIN) and the output capacitor (COUT) should be placed to the as close as possible with a shorter wiring. 2. If the impedance of the power supply is high, which is caused by forgetting installing input capacitor or installing too small value capacitor, the oscillation may occur. 3. Please pay attention to the operation conditions of input and output voltage and load current, such that the power consumption in the IC should not exceed the allowable power consumption of the package even though the chip has short circuit protection. IC has a built-in anti-static protection (ESD) circuit, but please do not add excessive stress to the IC. Ordering Information Part Name Package Marking MD7671A50SF4 ESOP8 7671A 4000/ Tape & Reel MD7671B50SF4 ESOP8 7671B 4000/ Tape & Reel MD7671E50QC3 SOT23-5 7671 3000/ Tape & Reel MD7671E33PA1 SOT89-3 7671E33 1000/ Tape & Reel MD7671A33PA1 SOT89-3 7671A33 1000/ Tape & Reel MD7671E50UB2 TO252-4 7671 2500/ Tape & Reel 10 / 14 Packing quantity All packages are lead-free MD7671 Series 1A 5V-Adjustable Low Dropout Voltage Regulator PACKAGING INFORMATION ESOP8 PACKAGE OUTLINE DIMENSIONS 11 / 14 MD7671 Series 1A 5V-Adjustable Low Dropout Voltage Regulator PACKAGING INFORMATION(CONTINUTED) 12 / 14 MD7671 Series 1A 5V-Adjustable Low Dropout Voltage Regulator PACKAGING INFORMATION(CONTINUTED) 13 / 14 MD7671 Series 1A 5V-Adjustable Low Dropout Voltage Regulator PACKAGING INFORMATION(CONTINUTED) TO252-4L PACKAGE OUTLINE DIMENSIONS www.md-ic.com.cn For the newest datasheet, please see the website: Version V1.1: 20201215 14 / 14