YB1210 – 300mA Ultra-Low-Noise, High PSRR LDO Regulator Description Features The YB1210 family consists of a series of 300mA ultra-low-noise, low dropout (LDO) linear regulators especially designed for battery-powered RF and wireless applications. The YB1210 regulator achieves a low 450mV dropout at 250mA load current of 3.3V output, ultra-low output voltage noise of 15µVrms and PSRR of 57dB at 1KHz. High Accuracy +-2% Output Voltage Ultra-Low-Noise Low-Drop-Out The YB1210 regulators are also optimized to work with low-ESR and low cost ceramic capacitors reducing the amount of board space critical in hand-held devices. The YB1210 requires only 0.47 µF output capacitor for stability with any load. The YB1210 consumes less than 1µA in shutdown mode. Other features include high output voltage accuracy and current limiting protection. The YB1210 regulators are available in SOT-23 / SOT-25 / SOT-89 packages. Regulator with 1.8/2.5/2.6/2.8/3.0V/3.3V Preset Outputs Stable with 0.47µF Ceramic Capacitor for Any Load Allowable Output Current: 300mA Low Quiescent Current: ~90µA 450mV Dropout at 250mA Load (3.3V) Only Need Input and Output Capacitors Power Saving Shutdown Mode (<1µA) Thermal Protection Shutdown Built-In Internal Soft-Start Output Short-circuit Current Limit Protection Green package (RoHS) available Applications PDA, Palmtops and Notebook Computers DSC, Handset Camera Modules PCMCIA Cards, PC Cameras USB Based Portable Devices (MP3, PMP) GSM/GPRS/3G RF Transceiver Modules Wireless LANs Bluetooth Portable Radios Typical Application Circuitry INPUT YB1210 IN OUTPUT PRESET OUT Cin=0.47uF Cout=0.47uF ON EN NC or Bypass OFF Cbypass =30nF GND Figure 1-1. SOT-25 application circuit YB1210 MRev.1.5 www.yobon.com.tw 1 YB1210 – 300mA Ultra-Low-Noise, High PSRR LDO Regulator Figure 1-2. SOT-23 / SOT-89 application circuit Pin Configuration Pin Description Table 1 Pin Name 1 IN 2 GND 3 EN Pin Name Unregulated Input Supply 1 GND Ground Pin 2 IN Unregulated Input Supply Pull High To Enable The Regulator 3 OUT Regulated Voltage Output Pin Name 1 OUT Regulated Voltage Output 2 GND Ground Pin 3 IN SOT-25 Description No Connection For Normal Operation Or Noise Bypass For Ultra-Low-Noise Operation By A 30nF Cap. To GND 4 N.C. or Bypass 5 OUT Pin Name 1 GND Ground Pin 2 OUT Regulated Voltage Output 3 IN Unregulated Input Supply YB1210 MRev.1.5 Regulated Voltage Output SOT-89 Description Ground Pin SOT-89R Description Unregulated Input Supply SOT-23 Description www.yobon.com.tw 2 YB1210 – 300mA Ultra-Low-Noise, High PSRR LDO Regulator Ordering Information Marking Information YB1210 MRev.1.5 www.yobon.com.tw 3 YB1210 – 300mA Ultra-Low-Noise, High PSRR LDO Regulator Absolute Maximum Ratings Recommended Operating Conditions Supply Voltage........................................ -0.3V to 7.0V Output Voltage ...............................-0.3V to (VIN+0.3V) Output Short-Circuit Duration ........................... Infinite Junction Temperature Range........................... +150℃ Storage Temperature Range ............. -65℃ to +150℃ Lead Temperature............................................ +250℃ Thermal Resistance (SOT-23/25, θJA).......... 280℃/W Thermal Resistance (SOT-89, θJA)............... 180℃/W Internal Power Disspation (SOT-23/25, PD)........0.4W Internal Power Disspation (SOT-89, PD)...........0.55W Input Supply Voltage................................ 2V to 6.0V Operating Temperature..................... -40℃ to +85℃ ESD Susceptibility (HBM).................................. 2KV ESD Susceptibility (MM)...................................200V Electrical Characteristics Table 3 TA = 25℃, VIN = ( VOUT + 1 V ), CIN = COU T = 0.47µF, VEN = VIN Function Parameter Conditions Input Voltage Range Min Typ Max Units 2.0 6.0 V Output Voltage Predefined (metal masks) 1.8 3.3 V Output Voltage Accuracy IOUT = 10mA -2.0 +2.0 % Output Current Limit Short-circuit output 200 250 mA VOUT = 3.3V, IOUT = 250mA 450 550 VOUT = 3.0V, IOUT = 250mA 470 590 VOUT = 2.8V, IOUT = 250mA 500 600 VOUT = 2.6V, IOUT = 250mA 520 620 VOUT = 2.5V, IOUT = 250mA 540 640 VOUT = 1.8V, IOUT = 250mA 800 900 Ground Current IOUT = 0 mA 90 150 µA Line Regulation VIN = (VOUT+1V) to 6.0V, IOUT = 10 mA 0.3 0.5 %/V Load Regulation IOUT = 1mA to 250mA 1.2 3 % Shutdown Supply Current EN=0V Dropout Voltage (See Note 1) YB1210 MRev.1.5 ~0.01 www.yobon.com.tw mV µA 4 YB1210 – 300mA Ultra-Low-Noise, High PSRR LDO Regulator Ripple Rejection (PSRR) f = 100Hz, IOUT=1mA 55 f = 1KHz, IOUT=1mA 57 f = 10KHz, IOUT=1mA 55 f = 100Hz to 100KHz, Iload=10mA, Bypass=0nF Output Noise Voltage f = 100Hz to 100KHz, Iload=10mA, Bypass=30nF dB 45 µVrms 15 µVrms Shutdown Exit Delay (See Note 2) Rload=50ohm EN Logic Low Level VIN=2.0V to 5.5V EN Logic High Level VIN=2.0V to 5.5V EN Input Bias Current VIN=5.5V, SHDN=0V or 6V 0.01 µA Thermal Shutdown Shutdown Temperature 160 ℃ 20 ℃ 45 1.2 Thermal-Shutdown Hysteresis 300 µs 0.4 V VIN V Note1 : The drop out voltage varies depending on output voltage selection Dropout is defined as VIN – VOUT when VOUT is 100mV below VOUT where Vin=Vout + 1V for nominal VOUT. Note 2: Time needed for VOUT to reach 90% of final value. Typical Characteristics At TA=25℃, VIN=(VOUT+0.5V), CIN=COUT=0.47µF, VEN=VIN, unless otherwise noted. Ground Current vs. Input Voltage Dropout Voltage vs Load Current 140 900 Ground Current (µA) Dropout Voltage (m V) 800 Vo=1.8V 700 600 Vo=2.5V 500 400 300 Vo=3.3V 200 120 100 80 60 40 20 0 0.0 100 Vo=3.3V 1.0 2.0 3.0 4.0 5.0 Input Voltage (V) 0 0 10 30 50 70 90 110 130 150 170 190 210 230 250 Load Current (m A) YB1210 MRev.1.5 www.yobon.com.tw 5 YB1210 – 300mA Ultra-Low-Noise, High PSRR LDO Regulator Output Voltage vs. Temperature 2.89 Output Voltage (V) 2.88 2.87 2.86 ILoad=1mA 2.85 2.84 2.83 2.82 ILoad=80mA 2.81 25 35 45 55 Temperature ( ℃ ) 65 75 85 Dropout Voltage vs Temperature Dropout Voltage (m V) 700 600 500 Vo=2.8V 85℃ 400 300 200 25℃ 100 0 0 10 30 50 70 90 110 130 150 170 190 210 230 250 Load Current (m A) Shutdown Exit Delay Vo=2.84V RLoad=50 Ω Shutdown Voltage YB1210 MRev.1.5 www.yobon.com.tw 6 YB1210 – 300mA Ultra-Low-Noise, High PSRR LDO Regulator Line Transient Response Load Transient Response 5V 3.34V CIN = 0.47µF COUT = 0.47µF VIN = 3.34V CIN = 0.47µF COUT = 0.47µF ILoad = 100µA 100mA 100µA Shutdown Delay Shutdown Voltage Vout RLoad=50 Ω YB1210 MRev.1.5 www.yobon.com.tw 7 YB1210 – 300mA Ultra-Low-Noise, High PSRR LDO Regulator Functional Block Diagram IN EN SHUTDOWN AND POWER-ON CONTROL ERROR AMP MOS DRIVER WITH LIMIT P OUT THERMAL SENSOR REFERENCE AND NOISE BYPASS GND Figure 3. Block Diagram Functional Description The YB1210 is an ultra-low-noise, low-quiescent current, low-dropout linear regulator. It is supplied in a SOT-23 / SOT-25 / SOT-89 package for different applications. These devices can supply loads up to 250mA. As shown in the Functional Block Diagram, the YB1210 consists of a reference and noise bypass circuit, error amplifier, output drive transistor, internal feedback voltage divider, thermal sensor, and short circuit current limiter. The internal reference is connected to the error amplifier’s inverting input. The error amplifier compares this reference with the feedback voltage and amplifies the difference. If the feedback voltage is lower than the reference voltage, the pass-transistor gate is pulled low. This allows more current to pass to the output and increases the output voltage. If the YB1210 MRev.1.5 feedback voltage is too high, the pass transistor gate is pulled high, allowing less current to pass to the output. The parts are available with preset output voltages ranging from 1.8V to 3.3V. Stability The YB1210 is a high performance LDO emphasizing stability with low output capacitance. It is able to maintain stability with an output capacitor as low as 0.47uF. The output capacitor can also be increased to optimize performance. The YB1210 will remain stable and in regulation with no load, unlike many other voltage regulators. Internal P-Channel Pass Transistor The YB1210 features a low impedance P-channel MOSFET pass transistor. This provides several advantages over similar www.yobon.com.tw 8 YB1210 – 300mA Ultra-Low-Noise, High PSRR LDO Regulator designs using a PNP pass transistor, including low operating power and longer battery life. The YB1210 consumes only 90µA of quiescent current under most conditions. up, the output capacitor and output load are charged with a reduced output current. Shortly after the initial power up, the soft-start feature is terminated and normal operation is resumed. Output Short-Circuit Current Limit Application Information The YB1210 includes a current limiter, which monitors and controls the pass transistor’s gate voltage, limiting the output current to about 200mA, for example, in a short-circuit output situation. Enable/Shutdown Shutdown The YB1210 also features a low-power active shutdown mode. It has a switch that turns off the device when disabled. This allows the output capacitor and load to discharge and de-energize the load. In the shutdown mode, the internal functional blocks, such as voltage reference and the error amplifier, are turned off completely, and the quiescent current is less than 1µA. Thermal Protection Shutdown The thermal protection shutdown function protects the device from operating in over temperature condition. When the junction temperature exceeds +160°C, the thermal sensor signals the shutdown logic, turning off the pass transistor and allowing the IC to cool down. The thermal sensor turns the pass transistor on again after the IC’s junction temperature drops to +140°C. Soft-Start Circuitry The YB1210 includes a soft-start circuitry to limit inrush current at turn-on. During power YB1210 MRev.1.5 The YB1210 comes with an active-high enable pin that allows the regulator to be enabled. Forcing the enable pin low disables the regulator and puts it into the shutdown mode. This pin cannot be left floating as it may cause an undetermined state. Input/Output Capacitor It is recommended to use a 0.47µF capacitor on the YB1210 input and a 0.47µF capacitor on the output. For high regulation performance, larger input capacitor values and lower ESRs provide better noise rejection and line-transient response. The output noise, load-transient response, stability, and power-supply rejection can be improved by using large output capacitors. Low ESR ceramic capacitors provide optimal performance and save space. Power Supply Rejection and Transient Response The PSRR and transient response can be improved by increasing the values of the input and output bypass capacitors, and through passive filtering techniques. www.yobon.com.tw 9 YB1210 – 300mA Ultra-Low-Noise, High PSRR LDO Regulator SOT-25 Package Information YB1210 MRev.1.5 www.yobon.com.tw 10 YB1210 – 300mA Ultra-Low-Noise, High PSRR LDO Regulator SOT-23 Package Information NOTE: 1. ALL DIMENSIONS ARE IN MILLIMETERS. 2. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSION OR GATE BURRS SHALL NOT EXCEED 0.25mm PER END. DIMENSION E1 DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. INTERLEAD FLASH OR PROTRUSION SHALL NOT EXCEED 0.25 PER SIDE. 3. THE PACKAGE TOP MAY BE SMALLER THAN THE PACKAGE BOTTOM. DIMENSIONS D AND E1 ARE DETERMINED AT THE OUTERMOST EXTREMES OF THE PLASTIC BODY EXCLUSIVE OF MOLD FLASH, THE BAR BURRS. GATE BURRS AND INTERLEAD FLASH, BUT INCLUDING ANY MISMATCH BETEEN THE TOP AND BOTTOM OF THE PLASTIC BODY.. 4. DIMENSION“b” 5. DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.08mm TOTAL IN EXCESS OF THE “b”DIMENSION AT MAXIMUM MATERIAL CONDITION. THE DAMBAR CANNOT BE LOCATED ON THE LOWER RADIUS OF THE FOOT . MINMUM SPACE BETWEEN PROTRUSION AND AN ADJACENT LEAD SHALL NOT BE LESS THAN 0.07mm 5. LEAD FRAME MATERIAL:EFTEC 64T YB1210 MRev.1.5 www.yobon.com.tw 11 YB1210 – 300mA Ultra-Low-Noise, High PSRR LDO Regulator SOT-89 Package Information YB1210 MRev.1.5 www.yobon.com.tw 12