Bay Linear Inspire the Linear Power 1.00Amp High Current Low Dropout Voltage Regulator Adjustable & Fix Description B1129/B1129-3.3/B1129-5.0 Features The Bay Linear B1129 is a 1 Amp high accuracy, low dropout voltage regulator with only 40mV at light loads and 450mV(Typ.)@ 1.0A) and low quiescent current of 240µA typical. The B1129 is designed for low voltage a application that requires lower dropout voltage and faster transient response. This device is an excellent choice for use in powering low voltage applications where require a lower dropout, faster transient response and as a post regulator for switching supplies applications. The B1129 offers full protection against over-current faults, reversed input polarity, reversed load insertion, and positive and negative transient voltage. On-Chip trimming adjusts the reference voltage to 1%. The B1129-xx devices are in 3 pin fixed voltage regulators. The B1129 include an Enable pin in the 5 pin packages. The B1129are offered in a 3 & 5-pin SOT-223 & TO-263 package compatible with other 3 terminal regulators. . Pin Connection • • • • • • • • • • High output accuracy of 2% 3.3V & 5.0V Output Adjustable from 1.24V to 26V Output Current of 1.00A Low Dropout Voltage Low quiescent current Extremely Tight Load & Line Regulation Reverse-battery and “Load Dump” Protection Zero Current Shutdown Mode (5-pin version) Offer in TO-263, & SOT-223 Similar to industry Standard LT1129 Applications • • • • • • • Powering VGA & Sound Card LCD Monitor Battery Powered Equipments/Laptop & Notebook SMPS Post Regulator / DC to DC Modules High Efficiency Linear Power Supply Adjustable Power Supply Bar Code Scanners Ordering Information Devices B1129N-X B1129S Package Temp. SOT-223 TO-263 -40 °C to 125 °C -40 °C to 125 °C TO-263-5 Package 1) OUT BAY B1129 B2941 1 2 3 4 5 2) ADJ 3) GND 4) ON/OFF SOT-223 Tab GND 5) OUPUT Top View Bay Linear, Inc Adj/GND IN GND OUT OUT IN Front View 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com B1129 ABSOLUTE MAXIMUM RATINGS Lead Temp. (Soldering, 5 Seconds).................................260°C Storage Temperature Range.............................. -65° to +150°C Operating Junction Temperature Range B1129/2941 Control Section ..................... -45°C +125°C B1129/2941 Power Transistor....................-45°C +150°C Input Voltage ........................................................26V Maximum Output Current....................................3.5A Input Supply Voltage (Note1) (Survival)-20V to +60V ELECTRICAL CHARACTERISTICS (NOTE 1) at IOUT = 5mA, V IN =V OUT + 1V, I l = 1000mA, C L = 10µF. Ta=25°C, unless otherwise specified. The B1129 is programmed to output 5V and has V SHUTDOWN ≤ 0.6V PARAMETER CONDITIONS Typ B1129 Min Units Max 3.3V Version2. Output Voltage (Note 2) IOUT = 5mA 5mA ≤IOUT≤1.00A, 4.75V≤VIN ≤26V 3.30 3.30 3.250 3.200 3.350 3.400 V IOUT = 5mA 5mA ≤IOUT≤1.00A, 5.5V≤VIN ≤26V 5.00 5.00 4.925 4.850 -1 -2 -2.5 5.075 5.150 1 2 2.5 V % 5.0V Version Output Voltage (Note 2) Output Voltage Accuracy 5mA ≤IOUT≤1.0 A All Voltage Options Line Regulation Load Regulation IO = 5mA, (VOUT + 1V) ≤ VIN≤ 26V VIN = VOUT + 5V, 5mA ≤ IOUT≤ 1 A (Note 2, 6) 1.5 6 10 20 mA mA Dropout Voltage IO = 10mA 40 200 mV IO = 500mA 370 450 IO = 1.00A 450 550 Ground Current IO = 10mA, VIN = VOUT, +1V IO = 500mA, VIN = VOUT, +1V IO = 1.00A 310 25 50 450 45 80 IGNDDO Ground Pin Current at Dropout Current Limit Output Noise Voltage (10Hz to 100kHz) IL = 100mA Reference Voltage VIN = 0.5V less than specified VOUT IOUT = 10mA 0.9 Reference Voltage Adjust Pin Bias Current Reference Voltage Temperature Coefficient Adjust Pin Bias Current Temperature Coefficient (Note 8)` Bay Linear, Inc VOUT = 0V (Note 4) 1.7 CL = 10µF 400 CL = 33µF mA 1.5 A µV RMS 260 1.235 40 (Note 7) µA mA 1.223 1.210 1.204 1.247 1.260 1.266 V Vmax V 80 120 nA 20 ppm/°C 0.1 nA/°C 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com B1129 ENABLE Input B1129 Input Logic Voltage Low (OFF) High (ON) V 0.8 2.4 Enable Pin Input Current VEN = 26V Regulator Output Current in Shutdown (Note 10) 100 600 750 2.5 5 VEN = 0.8V V µA µA 10 500 NOTES: The Bold specifications apply to the full operating temperature range. Note 1: Maximum positive supply voltage of 60V must be of limited duration (<100msec) and duty cycle.) The maximum continuous supply voltage is 26V. Note 2: Full load current (IFL) is defined as 1.00A for the B1129. Note 3: Dropout voltage is defined as the input-to output differential when the output voltage drops to 99% of its nominal value with VOUT + 1V applied to VIN. Note 4: VIN = VOUT (NOMINAL) +1V. For example, use VIN= 4.3V for a 3.3V regulator. Employ pulse-testing procedures to minimize temperature rise. Note 5: Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load current to the ground current. Note 6: Output voltage temperature coefficient is defined as the worst case voltage changed divided by the total temperature range. Note 7: Thermal regulation is defined as the change in the output voltage at a time T after a change in power dissipation is applied, excluding load or line regulation effects. Specifications are for a 200mA load pulse as VIN = 20V (a 4W pulse) for T = 10ms. Note 8: VREF ≤ VOUT ≤ (VIN - 1), 2.3V ≤ VIN≤ 26V, 10mA < IL ≤ IFL, TJ ≤ TJMAX Note 9: Comparator threshold is expressed in terms of a voltage differential at the Adjust terminal below the nominal reference voltage measured 6V input. To express these thresholds in terms of output voltage change, multiply the error amplifier gain = VOUT/VREF = (R1 + R2)/R2. For example, at a programmable output voltage of 5V, the Error output is guaranteed to go low when the output drops by 95mVx 5V/ 1.240V = 38mV. Threshold remains constant as a percent of VOUT as VOUT is varied, with the dropout warning occurring at typically 5% below nominal, 7.7% guaranteed. Note 10: VEN ≤ 0.8V and VIN≤ 26V, VOUT = 0. BLOCK DIAGRAM IN OUT O.V ILIMIT FLAG + - 1.180V Reference 1.240V 28V + R1* ADJ EN Thermal Shutdown R2* GND Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com Advance Information- These data sheets contain descriptions of products that are in development. The specifications are based on the engineering calculations, computer simulations and/ or initial prototype evaluation. Preliminary Information- These data sheets contain minimum and maximum specifications that are based on the initial device characterizations. These limits are subject to change upon the completion of the full characterization over the specified temperature and supply voltage ranges. The application circuit examples are only to explain the representative applications of the devices and are not intended to guarantee any circuit design or permit any industrial property right to other rights to execute. Bay Linear takes no responsibility for any problems related to any industrial property right resulting from the use of the contents shown in the data book. Typical parameters can and do vary in different applications. Customer’s technical experts must validate all operating parameters including “ Typical” for each customer application. LIFE SUPPORT AND NUCLEAR POLICY Bay Linear products are not authorized for and should not be used within life support systems which are intended for surgical implants into the body to support or sustain life, in aircraft, space equipment, submarine, or nuclear facility applications without the specific written consent of Bay Linear President. Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com