EUP7907 EUTECH | Alldatasheet

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DS7907 Ver 1.1 Oct . 2008 600mA High PSRR Low Dropout Linear Regulator

DESCRIPTION

The EUP7907 is a high current, low dropout linear regulator with fast transient response and high PSRR. It offers high output accuracy, extremely low dropout voltage, low quiescent current and fast start-up time. The EUP7907 is designed to work with low-ESR ceramic capacitor, reducing the amount of the PCB area necessary for power applications. Only a 2.2uF ceramic capacitor can make the device stable over the whole load range. The EUP7907 monitors the input voltage for power on reset to ensure the regulator is disabled when the input voltage is not high enough for normal operation. When EUP7907 detects fault signal, such as over-temperature, it will turn off the pass transistor and discharge VOUT to GND from the internal resistor. EUP7907 can be operated in two modes, operated in fixed mode when the FB pin connected to ground, its output is a pre-set value:0.8V~3.6V . There is no external component needed to decide the output voltage. Operated in adjustable mode when the FB pin connected to two external resistors divider, its output can be adjusted from 0.8V to 5V . Other key features include over-current protection, thermal shutdown. The device can be available in the TDFN-8 package or SOT23-5 package.

FEATURES

z 2.5V to 5.5V Input V oltage Range z 300mV@600mA Dropout V oltage z Excellent Transient Response z Stable with 2.2uF Ceramic Output Capacitor z 70dB PSRR at 1kHz z Low 120µA Quiescent Current z Low Shutdown Current:<1µA z Output Current Limit z Output V oltage With High Accuracy: 2% Initial Accuracy Fixed Output V oltage: 0.8V ~ 3.6V Adjustable Output V oltage: 0.8V to 5V z Thermal Shutdown z COUT Auto-Discharge when Shutdown z RoHS Compliant and 100% Lead (Fb)-Free

APPLICATIONS

z Bluetooth portable radios and Accessories z battery-Powered Equipment z Laptop, Palmtops, Notebook Computer Typical Application Circuit Figure. 1 Adjustable Output

DS7907 Ver 1.1 Oct . 2008 Typical Application Circuit (continued) Figure. 2 Fixed Output Block Diagram Figure. 3

DS7907 Ver 1.1 Oct . 2008 Pin Configurations Package Type Pin Configurations Package Type Pin Configurations SOT23-5 TDFN-8 Pin Description PIN SOT23-5 TDFN-8 DESCRIPTION VIN 1 1,2 Input V oltage of the LDO. GND 2 6 Signal Ground. EN 3 8 Enable Pin. Connect this pin to ground or less than 0.4V to disable the device. Active-high for EUP7907. FB 4 5 Feedback pin. This pin is the anode terminal of the error amplifier. The FB pin compares with internal reference voltage to regulate the output voltage. Connect to GND for fixed output voltage version. VOUT 5 3,4 Output voltage of the LDO. NC -- 7 Not connected.

DS7907 Ver 1.1 Oct . 2008

Ordering Information

Order Number Package Type Markin g Operating Temperature Range EUP7907-12VIR1 SOT23-5 xxxxx AC1T -40 °C to +85°C EUP7907-15VIR1 SOT23-5 xxxxx AC1C -40 °C to +85°C EUP7907-18VIR1 SOT23-5 xxxxx AC1D -40 °C to +85°C EUP7907-25VIR1 SOT23-5 xxxxx AC1B -40 °C to +85°C EUP7907-28VIR1 SOT23-5 xxxxx AC1E -40 °C to +85°C EUP7907-33VIR1 SOT23-5 xxxxx AC1H -40 °C to +85°C EUP7907-XXVIR1 SOT23-5 xxxxx xxxx -40 °C to +85°C EUP7907-18JIR1 TDFN-8 xxxxx P7907 -40 °C to +85°C EUP7907-28JIR1 TDFN-8 xxxxx P7907 -40 °C to +85°C EUP7907-33JIR1 TDFN-8 xxxxx P7907 -40 °C to +85°C EUP7907-XXJIR1 TDFN-8 xxxxx P7907 x x -40 °C to +85°C Lead Free Code 1 : L e a d F r e e 0 : L e a d P a c k i n g R : T a p e & R e e l Operating temperature range I: Industry Standard Package Type V : S O T - 2 3 J : T D F N - 8 Output Voltage XX: Voltage Options (0.8V~3.6V , 0.05V per step) Note：Every EUP7907 version can operate at adjustable mode by connecting FB pin to an external resistor divider.

DS7907 Ver 1.1 Oct . 2008 Absolute Maximum Ratings „ ESD Rating Operating Conditions

Electrical Characteristics

TA=25℃, VIN=VOUT+1V , or VIN=2.5V for VOUT<1.5V unless otherwise specified EUP7907 Symbol Parameter Conditions Min. Typ. Max. Unit Input Voltage VIN Input V oltage 2.5 5.5 V VPORTH POR Threshold 2.1 V VPORHYS POR hysteresis 0.4 V IQ Quiescent Current V EN=VIN, IOUT=0mA 120 180 µA ISHDN Shutdown Current V EN=0V 0.1 1 µA PSRR Power Supply Ripple Rejection VIN=VNOM+1VP-P,f=1kHz,ILOAD=10mA 70 dB VFB FB Pin V oltage 0.784 0.8 0.816 V Enable VENH Enable High V oltage Over temperature range 1.5 V VENL Disable Low V oltage Over temperature range 0.4 V IEN EN Input Current V IN=5V , VEN=5V or 0V -1 1 µA TST Start-up Time 40 µs Output voltage VIN=VNOM+1.0V , IOUT=10mA -2 +2 % VOUT Output V oltage Accuracy VIN=VNOM+1.0V , IOUT=10mA, TEMP=-40℃ to 85℃ -3 +3 % VLNR Output Line Regulation V OUT+0.5V<VIN<5.5V , IOUT=10mA 0.04 0.1 %/V VLDR Output Load Regulation 1 mA <I OUT<600mA, VIN=VNOM+1.0V 0.5 %/A IOUT=300mA 180 240 VDROP Dropout V oltage (Applied for VOUT≥2.3V) IOUT=600mA 360 450 mV IOUTMAX Maximum Output Current 600 mA

DS7907 Ver 1.1 Oct . 2008 Electrical Characteristics (continued) TA=25℃, VIN=VOUT+1V , or VIN=2.5V for VOUT<1.5V unless otherwise specified EUP7907 Symbol Parameter Conditions Min. Typ. Max. Unit Protection ILIMIT Current Limit 600 900 mA TSD Thermal Shutdown Temperature No Load, VIN=VEN=5V 170 ℃ TSDHYS Thermal Shutdown Hysteresis No Load, VIN=VEN=5V 30 ℃ Note 1: Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device. These are for stress ratings. Functional operation of the device at thes e or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may remain possibility to affect device reliability. Note 2: Dropout is defined as V IN-VOUT when VOUT is 100mV below the value of VOUT for VIN=VOUT+0.5V . Note 3: Test time needed for VOUT to reach 90% of final value

DS7907 Ver 1.1 Oct . 2008 Typical Characteristics

DS7907 Ver 1.1 Oct . 2008 Typical Characteristics (continued)

DS7907 Ver 1.1 Oct . 2008 Typical Characteristics (continued)

resistor divider and some additional protection circuits. transistor gate is pulled low to increase its conductivity. divider connected to the VOUT pin. voltage is 2.1V at VIN rising typically. pin higher than 1.5V to enable the device. Figure 4. Output Voltage Select Circuit output. The typical value is 0.9A. The EUP7907 monitor its temperature automatically.

DS7907 Ver 1.1 Oct . 2008 ( ) QINOUTOUTIND IVIVVP ×+×−= W455.0220)C25C125(P )MAX(D =°−°= W667.160)C25C125(P )MAX(D =°−°= JAA)MAX(J)MAX(D )TT(P θ−=

Application Information

Choose R2=100k to optimize accuracy, power supply rejection, noise and power consumption. And the R1 can be chosen by: OUT REF where V REF is the internal reference voltage, which is 0.8V in EUP7907. External Capacitor Like other low-dropout regulator, the EUP7907 requires external capacitors for stability. It is specifically designed for low-ESR capacitors requiring minimum PCB area and smallest components. Input Capacitor A 2.2uF capacitor is required between the VIN pin and the GND pin. Place it as close as possible to the device. There are no requirements for the ESR on the input capacitor, but the tolerance and temperature coefficient must be considered when selecting the capacitor to ensure the capacitance will be 2.2uF over the whole operating temperature range. Output Capacitor The EUP7907 is designed specifically to work with very small ceramic output capacitors. A 2.2uF to 10uF with 5mΩ to 500m Ω ESR range is suitable in the EUP7907 application circuit. The ESR of a typical 2.2uF ceramic capacitor is about 20m Ω, which easily meets the ESR requirement for stability. Capacitor Characteristics More consideration should be taken when selecting the capacitor because its capacitance can vary with temperature. The capacitor type X7R or X5R, which operates over a temperature range of -40 ℃ to +85 ℃, will only vary within ±15%. Some large value ceramic capacitors are manufactured with Z5U or T5V temperature characteristics. Their capacitance can drop by more than 50% as the temperature goes from 25 ℃ to 85℃. Therefore the capacitor type X7R or X5R is recommended in applications where the ambient temperature will change significantly above or below 25℃. No Load Stability The EUP7907 will remains stable and in regulation with no external load. This is special important in CMOS RAM keep-alive applications. Thermal Considerations Thermal protection limits power dissipation in EUP7907.When the operation junction temperature exceeds 170°C, the OTP circuit starts the thermal shutdown function and turns the pass element off. The pass element turn on again after the junction temperature cools by 30°C. For continuous operation, do not exceed absolute maximum operation junction temperature 125°C. The power dissipation definition in device is: ( E Q . 3 ) The maximum power dissipation depends on the thermal resistance of IC package, PCB layout, the rate of surroundings airflow and temperature difference between junction to ambient. The maximum power dissipation can be calculated by following formula : ( E Q . 4 ) Where T J(MAX) is the maximum operation junction temperature 125°C, TA is the ambient temperature and the θJA is the junction to ambient thermal resistance. For recommended operating conditions specification of EUP7907, where T J(MAX) is the maximum junction temperature of the die (125°C) and T A is the operated ambient temperature. The junction to ambient thermal resistance θ JA is layout dependent. For SOT-23-5 package, the thermal resistance θJA is 220°C/W on the standard thermal test board. For TDFN-8 package, the thermal resistance θ JA is 60°C/W on the standard thermal test board. The maximum power dissipation at T A = 25°C can be calculated by following formula : ( E Q . 5 ) f o r S O T 2 3 - 5 p a c k a g e ( E Q . 6 ) f o r T D F N - 8 p a c k a g e The maximum power dissipation depends on operating ambient temperature for fixed T J(MAX) and thermal resistance θJA. For EUP7907 packages, the Figure 5 of derating curves allows the designer to see the effect of rising ambient temperature on the maximum power allowed. Figure 5. Power Dissipation for EUP7907 Packages TDFN-8 and SOT23-5 packages.

DS7907 Ver 1.1 Oct . 2008 Packaging Information SOT23-5 MILLIMETERS INCHES SYMBOLS MIN. MAX. MIN. MAX. A - 1.30 - 0.052 A1 0.00 0.15 0.000 0.006 D 2.90 0.114 E1 1.60 0.063 E 2.60 3.00 0.102 0.118 L 0.30 0.60 0.012 0.024 b 0.30 0.50 0.012 0.020 e 0.95 0.037

DS7907 Ver 1.1 Oct . 2008 TDFN-8 MILLIMETERS INCHES SYMBOLS MIN. MAX. MIN. MAX. A 0.70 0.80 0.028 0.031 A1 0.00 0.05 0.000 0.002 b 0.20 0.40 0.008 0.016 D 2.90 3.10 0.114 0.122 D1 2.30 0.090 E 2.90 3.10 0.114 0.122 E1 1.50 0.059 e 0.65 0.026 L 0.25 0.45 0.010 0.018 DETAIL A