B29150 ETC1 | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 5

Technical content

Features

  • Adjustable & Fix Output
  • 1% output accuracy @2.5V, 3.3V, @ 5.0V
  • Output Current of 1.5A
  • Low Dropout Voltage of 350mV @ 1.5A
  • Extremely Tight Load & Line Regulation
  • Reverse-battery and “Load Dump” Protection
  • Zero Current Shutdown Mode (5-pin version)
  • Error Flag Signal Output-of-Regulation (5-pin version)
  • Offer in TO-263, TO-220, & New Slim LPDD
  • Similar to industry Standard MIC29150

Applications

  • Powering VGA & Sound Card
  • LCD Monitor
  • USB Power Supply
  • SMPS Post Regulator
  • High Efficiency ”Green” Computer System
  • Adjustable Power Supply Bay LinearBay LinearBay LinearBay Linear Inspire the Linear PowerInspire the Linear PowerInspire the Linear PowerInspire the Linear Power VOUTGNDVIN BAY B29150 Front View 12 3 OUTPUT Top View BAY B29151/52/53 321 GND FLAG 2) INPUT ENABLE GND ADJUST 2) INPUT ENABLE GND ADJUST 2) INPUT FLAG OUTPUT OUTPUT B29151 B29152 B29153 Front View BAY B29150 VIN VOUTGND

Bay Linear, Inc 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com B29150 ABSOLUTE MAXIMUM RATINGS Operating Junction Temperature Range Input Supply Voltage (Note1) (Survival)-20V to +60V ELECTRICAL CHARACTERISTICS (NOTE 1) at IOUT = 10mA, Ta=25°C, unless otherwise specified. PARAMETER CONDITIONS Typ B29150/51/52/53 Min Max Units 2.5V Version Output Voltage (Note 2) IOUT = 10mA 10mA ≤IOUT≤1.5A, 4.75V≤VIN ≤26V 2.5 2.5 2.475 2.450 2.525 2.550 V 3.3V Version2. Output Voltage (Note 2) IOUT = 10mA 10mA ≤IOUT≤1.5A, 4.75V≤VIN ≤26V 3.3 3.3 3.267 3.234 3.330 3.366 V 5.0V Version Output Voltage (Note 2) IOUT = 10mA 10mA ≤IOUT≤1.5A, 5.5V≤VIN ≤26V 5.0 5.0 4.95 4.90 5.05 5.10 V All Voltage Options Line Regulation IO = 10mA, (VOUT + 1V) ≤ VIN≤ 26V 0.06 0.5 % Load Regulation VIN = VOUT + 5V, 10mA ≤ IOUT≤ IFULLLOAD (Note 2, 6) 0.2 1 % ∆V° 20 100 ppm/°C Output Voltage (Note 6) Temperature Coef. IO = 100mA 80 200 IO = 750mA 220 Dropout Voltage IO = 1.5A 350 600 mV Ground Current I O = 750mA, VIN = VOUT, +1V IO = 1.5A 20 mA IGNDDO Ground Pin Current at Dropout VIN = 0.5V less than specified VOUT IOUT = 10mA 0.9 mA Current Limit VOUT = 0V (Note 4) 1.7 1.5 A Output Noise Voltage (10Hz to 100kHz) IL = 100mA CL = 10µF CL = 33µF 400 260 µV RMS Reference Voltage 1.240 1.228 1.215 1.252 1.265 V Reference Voltage (Note 8)\` 1.203 1.277 V Adjust Pin Bias Current 40 80 120 nA Reference Voltage Temperature Coefficient (Note 7) 20 ppm/°C Adjust Pin Bias Current Temperature Coefficient 0.1 nA/°C Flag Output (Error Comparator) B29152/53 Output Leakage Current VOH = 26V 0.01 1.00 2.00 µA Output Low Voltage Device set for 5V. VIN = 4.5V IOL = 250µA 220 300 400 mV

Bay Linear, Inc 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com B29150 Upper Threshold Voltage Device set for 5V (Note 9) 60 40 mV Lower Threshold Voltage Device set for 5V (Note 9) 75 95 140 mV Hysteresis Device set for 5V (Note 9) 15 mV ENABLE Input B29152/53 Input Logic Voltage Low (OFF) High (ON) 2.4 0.8 V VEN = 26V 100 600 750 V Enable Pin Input Current VEN = 0.8V 2.5 µA Regulator Output Current in Shutdown (Note 10) 10 500 µA 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 16V. Note 2: Full load current (IFL) is defined as 1.5A for the B29150/51/52/53. 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 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≤ 16V, 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≤ 16V, VOUT = 0. BLOCK DIAGRAM Reference Thermal Shutdown EN IN OUT ADJ GND O.V ILIMIT 28V R1* R2* 1.180V 1.240V FLAG

Bay Linear, Inc 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com B29150 APPLICATION HINTS The Bay Linear B29150/51/52/53 incorporates protection against over-current faults, reversed load insertion, over temperature operation, and positive and negative transient voltage. However, the use of an output capacitor is required in order to insure the stability and the performances. Thermal Consideration Although the B29150/51/52/53 offers limiting circuitry for overload conditions, it is necessary not to exceed the maximum junction temperature, and therefore to be careful about thermal resistance. The heat flow will follow the lowest resistance path, which is the Junction- to-case thermal resistance. In order to insure the best thermal flow of the component, a proper mounting is required. Note that the case of the device is electrically connected to the output. The case has to be electrically isolated, a thermally conductive spacer can be used. However do not forget to consider its contribution to thermal resistance. Assuming: V IN = 10V, VOUT = 5V, IOUT = 1.5A, TA = 90°C, θCASE= 1°C/W (no external heat sink, no wind) Power dissipation under these conditions P D = (VIN – VOUT) * IOUT = 7.5W Junction Temperature T J = TA + PD * (θCASE+ θJC) For the Control Section 114°C < TJUNCTION MAX for the control section. For the Power Section 109.5°C < TJUNCTION MAX for the power transistor. In both case reliable operation is insured by adequate junction temperature. Capacitor Requirements The output capacitor is needed for stability and to minimize the output noise. The required value of the capacitor varies with the load. However, a minimum value of 10 µF Aluminum will guarantee stability over load. A tantalum capacitor is recommended for a fast load transient response. If the power source has high AC impedance, a 0.1 µF capacitor between input & ground is recommended. This capacitor should have good characteristics up to 250 kHz. Minimum Load Current To ensure a proper behavior of the regulator at light load, a minimum load of 5mA for B29150/51/52/53 is required. Adjustable Regulator Design B29152/53 are adjustable regulators and maybe programmed for any value between 1.25V and 16V using two resistors. The relation between the resistors is given by: R1=R2 (VOUT/1.240 –1) Resistors have a large value up to 1m Ω in order to reduce the current consumption. This might be interesting in the case of widely varying load currents. Error Flag B29152/53 features an error indicating either an over current fault or a low input voltage. This flag pulls low when such a problem occurs and may sink 10mA. It is inoperative during thermal shutdown. Enable Input B29152/53 features enable input allowing turning ON & OFF the device. EN has been designed to be compatible with TTL/CMOS logic. When the regulator is ON, the current flowing through this pin is approximately 20µA. BAY B29150 Fig.1 Basic Fixed Output Regulator V OU TVIN

1 BAY

Fig. 2 Adjustable Output Voltage Regulator VOUT = VREF X [1 + (R1/ R2)] For best results, the total series resistance should be small enough to pass the minimum regulator load current

Bay Linear, Inc 2478 Armstrong Street, Livermore, CA 94550 Tel: (925) 989-7144, Fax: (925) 940-9556 www.baylinear.com B29150 Advance Information- These data sheets contain descriptions of products that are in development. The specifications are based on the engineering ca lculations, 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 lim its 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 i mplants into the body to support or sustain life, in aircraft, sp ace equipment, submarine, or nuclear facility applications wit hout the specific written consent of Bay Linear President.