SC1592MSTRT-01

SC1592M Low Dropout High Performance Adjustable Positive Voltage Regulator HIGH-RELIABILITY PRODUCTS Features            Description Wide input range, VIN = 1.25V to 16V VCNTL = 3V to 16V 3A guaranteed output current 260mV (typ.) @ 3A dropout voltage in dual supply mode 1% initial accuracy Adjustable output voltage down to 0.8V Programmable current limiting with thermal shutdown Fast transient response Excellent line and load regulation Military temperature range: -55°C to + 125°C The SC1592 voltage regulator is available in SOIC-8L EDP package Pb-free, halogen free, RoHS / WEEE compliant The SC1592 is a 3A low dropout high performance linear voltage regulator that provides a low voltage, high current output with a minimum of external components, utilizing dual supply configuration. The SC1592 offers a wide input voltage range from 1.25V to 16V and is ideal for applications that need to convert down to 0.8V. Additionally, the SC1592 is fully protected with an externally programmable current limit, and thermal shutdown. Also, there is an EN input which enables or shuts down the device. Applications    Low voltage logic supplies Microcontroller supplies Post regulation Typical Application Circuit +3.3V VCNTL CNTL C1 1µF +2.5V VIN C3 47µF SENSE EN GND ILIM C2 10µF R1 100 TTL Rev 2.1 R2 66.5 SC1592M IN +1.8V VOUT OUT 1 R3 53 R2   V OUT =  1 +  • V REF R3   V REF = 0 . 8 V typ . SC1592M Absolute Maximum Ratings Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied. Parameter Symbol Maximum Units Power Input Voltage VIN 18 V Control Input Voltage VCNTL 18 V Output Current IOUT 5 A Power Dissipation PD Internally limited W Thermal Resistance Junction to Ambient ƟJA 36.5 °C/W Thermal Resistance Junction to Case ƟJC 5.5 °C/W Junction Temperature Range TJ -55 to +125 °C Storage Temperature Range TSTG -65 to +150 °C Lead Temperature (Soldering) 10 sec. TLEAD 300 °C ESD Rating (Human Body Model) ESD 2 kV Electrical Characteristics Unless otherwise specified: VIN = 2.5V, VEN = VCNTL = 3.3V, VOUT = 1.8V, IOUT = 10mA, RLIM = 100Ω, TJ = TA = 25°C Values in bold indicate -55°C < TJ < +125°C Parameter Symbol Test Conditions Min Control Voltage VCNTL VOUT = VREF 3 Reference Voltage VREF VOUT = VREF 792 VCNTL = VIN = VEN = 16 Control Pin Current ICNTL_EN VOUT = VREF; IOUT = 0A VCNTL = VIN = VEN = 16 VOUT = VREF; IOUT = 3A Control Pin Current in Shutdown Rev 2.1 Typ Max Units 16 V 800 808 mV 3 8 mA 24 VCNTL = VIN = 16, ICNTL_DIS 1 VEN = 0V 2 5 μA SC1592M Parameter Symbol VIN Line Regulation REG(LINE) VCNTL Line Regulation Load Regulation (1) REG(CNTL) REG(LOAD) Dropout Voltage VDD Thermal Shutdown TSHUT Test Conditions Min Typ Max Units 0.01 0.1 %/V 0.1 0.4 %/V 10mA ≤ IOUT ≤ 2A, TJ = 25°C 0.8 1.5 10mA ≤ IOUT ≤ 3A, -55°C ≤ TJ ≤ +125°C 1.4 3 IOUT = 2A; VOUT = 0.98Vnom 160 320 IOUT = 3A; VOUT = 0.98Vnom 260 2.5V ≤ VIN ≤ 16V 3.3V ≤ VCNTL ≤ 16V VOUT = VREF 520 % mV 150 °C Thermal Shutdown Hyst. 10 °C SENSE Input Current 1 μA 0.8 Low Level EN High Level EN 2 EN Input Current VEN = VCNTL = 5V Current Limit Accuracy (2) 100 65 ILIM -20 Notes: (1) For load regulation use a 1ms current pulse width, d.c. ≤ 10% when measuring VOUT (2) Current limit is programmable, see page 4 Rev 2.1 V 55 EN Impedance 3 V μA kΩ +20 % SC1592M Pin Configuration Ordering Information Part Number Package Temp. Range (TJ) SC1592MSTRT SOIC-8L EDP -55°C to +125°C (1) Available in tape and reel only. A reel contains 2,500 devices. Contact factory for smaller quantities. (2) Pb-free, halogen free, RoHS / WEEE compliant. Device Marking SC1592M Marking for the SOIC EP 8 package: (1)SC1592M: part number; (2 )xxxxxxx: Semtech lot number; (3) yyww: date code Rev 2.1 4 SC1592M Pin Description Pin # 1 2, 3 Pin Name Pin Function ILIM Externally programmable current limit should be set at < 5A. IN This is the collector input to the power device. The output load current is supplied through this pin. 4 CNTL This pin is the bias supply for the control circuitry. The current flow into this pin will be approximately 1% of the output current. For the device to regulate, the voltage on this pin must be at least 1.5V greater than the output voltage, but no less than VCNTL_MIN. 5,6 OUT This is the power output of the device. 7 SENSE This is a feedback input. 8 EN Enable input. When high, should be less than or equal to VCNTL. GND Ground. PAD Rev 2.1 5 SC1592M Block Diagram CNTL IN + Thermal Shutdown Amp - * EN OUT Bandgap Reference SENSE - Current Limit ILIM + RILIM GND Figure 1 V  RLIM ≈ 240 ×  OUT   I LIM  ILIM = Selected current limit value VOUT = Regulated output voltage RLIM = Externally programmable current limit resistor Accuracy of the current limit setting is better than 20% over full operating temperature range. * Internal ESD structure. In cases where EN is permanently tied to VIN, it’s recommended that a 10-20k resistor should be inserted in the link between EN and VIN. Rev 2.1 6 SC1592M Description +3.3V VCNTL The SC1592 is a 3A low dropout high performance linear voltage regulator. The SC1592 can be used for voltage applications as low as 0.8V and is ideal for down conversion utilizing dual supply configuration. This allows for extremely low dropout voltages with excellent load and line regulation. The SC1592 can be utilized in high voltage applications, with VIN and VCNTL up to 16V, providing there is adequate thermal management. CNTL C1 2.2μF +2.5V VIN C2 22μF SC1592 is designed to meet stringent requirements of current generation microcontrollers and other sensitive electronic devices. This is possible by employing an additional bias source, VCNTL. The voltage of this supply needs to be at least 1.5V greater than the output voltage in order to achieve low dropout, typically less than 300mV. R2 66.5 SC1592M IN 10k +1.8V VOUT OUT C3 100μF SENSE EN GND ILIM R1 100 R3 53 R2   VOUT = 1 +  • VREF R3   VREF = 0.8V typ . Figure 2 The circuit in Figure 2 shows a typical application of 2.5V to Unlike most of the other high current linear regulators, the 1.8V conversion with a 3.3V control supply and the load SC1592 provides a programmable current limit which can range of up to 3A steady state. Considering the approximate be set with a single resistor. The value of the programming 2W power being dissipated by the pass element of the resistor is: SC1592, we are still able to choose an SO-8 EDP package VOUT  with TJA = 36.5°C/W mounted on a 1sq. in. copper pad RLIM ≈ 240 ×   I allocated for adequate heat transfer. The ambient  LIM  temperature in this case should not exceed 50°C. where ILIM = selected current limit value VOUT = regulated output voltage RLIM = programmable current limit resistor Input capacitor: A minimum of 10μF ceramic capacitor is recommended to be placed directly next to the Vin pin. This allows for the device being some distance from any bulk capacitance on the rail. Additionally, bulk capacitance may be added close to the input supply pin of the SC1592 to ensure that Vin does not sag, improving load transient response. The SC1592 has a fast transient response that allows it to handle large load changes associated with high current applications. Proper selection of the output capacitor and its ESR value determines stable operation and optimizes performance. Output capacitor: A minimum bulk capacitance of 33μF, along with a 0.1μF ceramic decoupling capacitor is recommended. Increasing the bulk capacitance will improve the overall transient response. The use of multiple lower value ceramic capacitors in parallel to achieve the desired bulk capacitance will not cause stability issues. Although designed for use with ceramic output capacitors, the SC1592 is extremely tolerant of output capacitor ESR values and thus will also work comfortably with electrolytic output capacitors. The typical application shown in Figure 2 was tested with a wide range of different capacitors. The circuit was found to be unconditionally stable with capacitor values from 47μF to 330μF and ESR ranging from 0.5mΩ to greater than 75mΩ. It’s recommended to maintain 5-10mA through the output divider network in order to have a tight load and line regulation. Initial accuracy of the internal voltage reference VREF = 0.8V ±1% over full temperature range. This commands the use of 0.5% or better accuracy resistors to build a precision power supply. Rev 2.1 7 SC1592M Typical Characteristics Load Transient Response Load Transient Response VIN = 2.5V; VOUT = 1.8V; VCNTL = 3.3V; CIN = 22μF; COUT = 100μF VIN = 2.5V; VOUT = 1.8V; VCNTL = 3.3V; CIN = 22μF; COUT = 100μF Load Regulation Dropout Voltage (Control Supply) Droput Voltage (Input Supply) Rev 2.1 8 SC1592M Typical Characteristics (Cont.) Output Voltage vs Temperature Enable Threshold vs Temperature 2 2 1.95 1.8 VCNTL = 3.3V VIN = 2.5V IOUT = 10mA 1.9 Enable Threshold [V] Output Voltage [V] 1.85 VCNTL = 3.3V VIN = 2.5V VOUT = 1.8V IOUT = 10mA 1.6 1.8 1.75 1.7 1.65 1.4 1.2 1 0.8 1.6 0.6 1.55 0.4 1.5 -55 -35 -15 5 25 45 65 Ambient Temperature [°C] 85 105 -55 125 -35 -15 5 25 45 65 85 105 125 Ambient Temperature [°C] Control Current vs Temperature (In Regulation) Control Current vs Temperature (In Shutdown) 100 10000 VCNTL = 3.3V VIN = 2.5V VEN = 0V Control Current [nA] Control Current [mA] 1000 IOUT = 3A IOUT = 2A 10 IOUT = 1A 100 10 VCNTL = 3.3V VIN = 2.5V 1 -55 -35 -15 5 25 45 65 Ambient Temperature [°C] 85 105 1 125 -55 Droput Voltage vs Temperature (VCNTL - VOUT) -15 5 25 45 65 Ambient Temperature [°C] 85 105 125 105 125 Droput Voltage vs Temperature (VIN - VOUT) 500 1500 1400 450 INITIAL VCNTL = 3.3V VIN = 2.5V VOUT = 1.8V IOUT = 3A 1300 400 IOUT = 3A 350 Dropout Voltage [mV] 1200 Dropout Voltage [mV] -35 1100 1000 900 300 250 200 800 150 700 100 600 50 IOUT = 2A VCNTL = 3.3V INITIAL VIN = 2.5V VOUT = 1.8V 0 500 -55 -35 Rev 2.1 -15 5 25 45 65 Ambient Temperature [°C] 85 105 -55 125 9 -35 -15 5 25 45 65 Ambient Temperature [°C] 85 SC1592M Typical Characteristics (Cont.) Rev 2.1 10 SC1592M Outline Drawing – SOIC-8L EDP Landing Pattern – SOIC-8L EDP Rev 2.1 11 SC1592M © Semtech 2017 All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent or other industrial or intellectual property rights. Semtech assumes no responsibility or liability whatsoever for any failure or unexpected operation resulting from misuse, neglect improper installation, repair or improper handling or unusual physical or electrical stress including, but not limited to, exposure to parameters beyond the specifi ed maximum ratings or operation outside the specified range. SEMTECH PRODUCTS ARE NOT DESIGNED, INTENDED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN LIFESUPPORT APPLICATIONS, DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF SEMTECH PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE UNDERTAKEN SOLELY AT THE CUSTOMER’S OWN RISK. Should a customer purchase or use Semtech products for any such unauthorized application, the customer shall indemnify and hold Semtech and its offi cers, employees, subsidiaries, affi liates, and distributors harmless against all claims, costs damages and attorney fees which could arise. Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. Rev 2.1 12