YB1200 – High Accuracy Ultra-Low-Noise, High PSRR LDO Regulator Description Features High Accuracy +-2% The YB1200 family consists of a series of 150mA ultra-low-noise, low dropout (LDO) linear regulators especially designed for battery-powered RF and wireless applications. The YB1200 regulator achieves a low 250mV dropout at 150mA load current of 3.3V output, ultra-low output voltage noise of 15µVrms and PSRR of 57dB at 1KHz. Ultra-Low-Noise Low-Drop-Out The YB1200 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 YB1200 requires only 0.47 µF output capacitor for stability with any load. The YB1200 consumes less than 1µA in shutdown mode. Other features include high output voltage accuracy and current limiting protection. The YB1200 regulators are available in a tiny SC-70 / SC-82 package. Regulator with 1.8/2.5/2.6/2.8/3.0/3.3V Preset Outputs Stable with 0.47µF Ceramic Capacitor for Any Load Typical Output Current: 150mA Low Quiescent Current: ~90µA 250mV Dropout at 150mA 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 Circuit YB1200 INPUT IN OUTPUT PRESET OUT Cin=0. 47 uF ON EN OFF NC or Bypass GND Cout=0. 47 uF Cbypass =30nF Figure 1-1. SC-70 application circuit YB1200 MRev.1.4 www.yobon.com.tw 1 YB1200 – High Accuracy Ultra-Low-Noise, High PSRR LDO Regulator YB1200 INPUT IN OUTPUT PRESET OUT Cin=0. 47 uF ON EN Cout=0. 47 uF OFF GND Figure 1-2. SC-82 application circuit Pin Configuration SC-70 Figure 2. Pin configuration Pin Description Table 1 Pin Name 1 IN 2 GND 3 EN 4 N.C. Bypass SC-70 Description Unregulated Input Supply. Ground pin. Pull high to enable the regulator. No external connection needed for normal operation. Noise Bypass for Ultra-Low-Noise Operation by connecting a 30nF capacitor from Bypass to GND. 5 OUT Pin Name 1 EN 2 GND Ground pin. 3 OUT Regulated Output Voltage. 4 IN Unregulated Input Supply. YB1200 MRev.1.4 Regulated Output Voltage. Bypass with a capacitor to GND. SC-82 Description Pull high to enable the regulator. www.yobon.com.tw 2 YB1200 – High Accuracy Ultra-Low-Noise, High PSRR LDO Regulator Ordering Information Table 2 YB1200 Order Information Output Voltage Grade Order Information Package Marking Supplied as: SC70-5 Small Package 1.8 Green Package+ Standard YB1200SC70S-1.8G BA 3000 Units Tape & Reel 2.5 Green Package+ Standard YB1200SC70S-2.5G BB 3000 Units Tape & Reel 2.6 Green Package+ Standard YB1200SC70S-2.6G BE 3000 Units Tape & Reel 2.8 Green Package+ Standard YB1200SC70S-2.8G BC 3000 Units Tape & Reel 3.0 Green Package+ Standard YB1200SC70S-3.0G BF 3000 Units Tape & Reel 3.3 Green Package+ Standard YB1200SC70S-3.3G BD 3000 Units Tape & Reel SC-82 Small Package 1.8 Green Package+ Standard YB1200SC82S-1.8G DA 3000 Units Tape & Reel 2.5 Green Package+ Standard YB1200SC82S-2.5G DB 3000 Units Tape & Reel 2.6 Green Package+ Standard YB1200SC82S-2.6G DE 3000 Units Tape & Reel 2.8 Green Package+ Standard YB1200SC82S-2.8G DC 3000 Units Tape & Reel 3.0 Green Package+ Standard YB1200SC82S-3.0G DF 3000 Units Tape & Reel 3.3 Green Package+ Standard YB1200SC82S-3.3G DD 3000 Units Tape & Reel YB1200 MRev.1.4 www.yobon.com.tw 3 YB1200 – High Accuracy Ultra-Low-Noise, High PSRR LDO Regulator Absolute Maximum Ratings Recommended Operating Conditions Supply Voltage........................................ -0.3V to 7.0V Input Supply Voltage................................ 2V to 6.0V Output Voltage ...............................-0.3V to (VIN+0.3V) Operating Temperature..................... -40℃ to +85℃ Output Short-Circuit Duration ........................... Infinite ESD Susceptibility (HBM)...........................................2KV Junction Temperature Range........................... +150℃ ESD Susceptibility (MM)........................................... 200V Storage Temperature Range ............. -65℃ to +150℃ Lead Temperature............................................ +250℃ Thermal Resistance (SC-70/82, θJA) ............ 330℃/W Internal Power Disspation (SC-70/82, PD)……...0.3W Electrical Characteristics Table 3 TA = 25℃ , VIN = ( VOUT + 1V ), CIN = COUT = 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 VOUT = 3.3V, IOUT = 150mA 250 VOUT = 3.0V, IOUT = 150mA 275 VOUT = 2.8V, IOUT = 150mA 300 VOUT = 2.6V, IOUT = 150mA 310 VOUT = 2.5V, IOUT = 150mA 320 VOUT = 1.8V, IOUT = 150mA 500 Ground Current IOUT = 0 mA 90 µA Line Regulation VIN = (VOUT + 1V) to 6.0V, IOUT = 10 mA 0.3 %/V Load Regulation IOUT = 1mA to 150mA 1.2 % Shutdown Supply Current EN=0V ~0.01 µA Dropout Voltage (See Note 1) YB1200 MRev.1.4 www.yobon.com.tw mA mV 4 YB1200 – High Accuracy Ultra-Low-Noise, High PSRR LDO Regulator f = 100Hz, IOUT=1mA 52 f = 1KHz, IOUT=1mA 55 f = 10KHz, IOUT=1mA 53 f = 100Hz to 100KHz, Iload=10mA, Bypass=0nF 45 µVrms f = 100Hz to 100KHz, Iload=10mA, Bypass=30nF 15 µVrms Shutdown Exit Delay (See Note 2) Rload=50ohm 45 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, EN=0V or 6V 0.01 µA Thermal Shutdown Shutdown Temperature 160 ℃ 20 ℃ Ripple Rejection (PSRR) Output Noise Voltage dB 1.2 Thermal-Shutdown ysteresis 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 + 1V), CIN = COUT = 0.47µF, VEN = VIN, unless otherwise noted. Dropout Voltage vs Load Current Dropout Voltage vs Temperature 400 500 D ropout V oltage (m V ) Dropout Voltage (m V) 600 Vo=1.8V 400 Vo=2.5V 300 200 100 Vo=3.3V 350 Vo=2.8V 85℃ 300 250 200 150 25℃ 100 50 0 0 10 30 50 70 90 110 130 150 0 0 Load Current (m A) YB1200 MRev.1.4 10 30 50 70 90 110 130 150 Load Current (m A) www.yobon.com.tw 5 YB1200 – High Accuracy Ultra-Low-Noise, High PSRR LDO Regulator ILOAD=1mA Output Voltage vs. Temperature 2.89 Output Voltage (V) 2.88 2.87 2.86 2.85 ILoad=1mA 2.84 2.83 2.82 ILoad=80mA 2.81 25 35 45 55 Temperature ( ℃ ) 65 75 85 Ground Current vs. Input Voltage Ground Current (µA) 140 120 100 80 60 40 20 0 0.0 1.0 2.0 3.0 4.0 5.0 Input Voltage (V) YB1200 MRev.1.4 www.yobon.com.tw 6 YB1200 – High Accuracy Ultra-Low-Noise, High PSRR LDO Regulator Shutdown Delay Shutdown Exit Delay Shutdown Voltage Vo=2.84V RLoad=50Ω Vo RLoad=50Ω Shutdown Voltage 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 YB1200 MRev.1.4 www.yobon.com.tw 7 YB1200 – High Accuracy 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 YB1200 is an ultra-low-noise, low-quiescent current, low-dropout linear regulator. It is supplied in a SC-70 and SC-82 package for space and noise sensitive applications. These devices can supply loads up to 150mA. As shown in the Functional Block Diagram, the YB1200 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 feedback voltage is too high, the pass YB1200 MRev.1.4 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 YB1200 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 YB1200 will remain stable and in regulation with no load, unlike many other voltage regulators. Internal P-Channel Pass Transistor The YB1200 features a low impedance P-channel MOSFET pass transistor. This provides several advantages over similar designs using a PNP pass transistor, including low operating power and longer www.yobon.com.tw 8 YB1200 – High Accuracy Ultra-Low-Noise, High PSRR LDO Regulator battery life. The YB1200 consumes only 90µA of quiescent current under most conditions. 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 YB1200 includes a current limiter, which monitors and controls the pass transistor’s gate voltage, limiting the output current to about 200 mA, for example, in a short-circuit output situation. Enable/Shutdown Shutdown The YB1200 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 YB1200 includes a soft-start circuitry to limit inrush current at turn-on. During power up, the output capacitor and output load are charged with a reduced output current. YB1200 MRev.1.4 The YB1200 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 YB1200 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 YB1200 – High Accuracy Ultra-Low-Noise, High PSRR LDO Regulator SC-70 Package Information Symbol Millimeters Inches MIN. MAX. MIN. MAX. A 0.90 1.10 .036 0.44 A1 0.025 0.10 .001 .004 A2 0.875 1.00 .035 .040 b 0.20 0.40 .008 .016 C 0.10 0.15 .004 .006 D 1.90 2.10 .076 .084 E 1.15 1.35 .046 .054 E1 2.00 2.20 .080 .088 e 0.65 BSC. .026 BSC. e1 1.30 BSC. .052 BSC. L 0.425 REF. .017 REF. Note: 1. All dimensions are in millimeters, and the dimensions in inches are for reference only. 2. 1mm=40mils=0.04inches YB1200 MRev.1.4 www.yobon.com.tw 10 YB1200 – High Accuracy Ultra-Low-Noise, High PSRR LDO Regulator SC-82 Package Information NOTE: 1. CONTROLUNG DIMENSION: mm 2. LEAD FRAME MATERIAL:EFTEC-64T 1/2H OR H. 3. DIMENSION D DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS, MOLD FLASH/PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.15 mm PER SIDE, 4. DIMENSION E1 DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. INTERLEAD FLASH OR PROTRUSION SHALL NOT EXCEED 0.15mm PER SIDE. YB1200 MRev.1.4 www.yobon.com.tw 11