|Category||Power Management => DC-DC Converters => DC-DC Switching => Switching DC-DC Regulation|
|Title||Switching DC-DC Regulation|
|Description||up to 2A Step Down Switching Regulator|
|Company||ST Microelectronics, Inc.|
|Datasheet||Download L5972 datasheet
2A INTERNAL SWITCH OPERATING INPUT VOLTAGE FROM TO 36V OUTPUT VOLTAGE ADJUSTABLE FROM TO 35V LOW DROPOUT OPERATION: 100% DUTY CYCLE 250KHz INTERNALLY FIXED FREQUENCY VOLTAGE FEEDFORWARD ZERO LOAD CURRENT OPERATION INTERNAL CURRENT LIMITING PROTECTION AGAINST FEEDBACK DISCONNECTION THERMAL SHUTDOWN
DESCRIPTION The is a step down monolithic power switching regulator with a minimum switch current limit it is able to deliver more than 1.5A DC current to the load depending on the application conditions. The output voltage can be set from to 35V. The device uses an internal P-Channel D-MOS transistor (with a typical Rdson 250m) as switching element to minimize the size of the external components. An internal oscillator fixes the switching frequency at 250KHz. Having a minimum input voltage of 4.4V only, it is particularly suitable for 5V bus, available in all computer related applications. Pulse by pulse current limit with the internal frequency modulation offers an effective constant current short circuit protection.
APPLICATIONS: s CONSUMER: STB, DVD, TV, VCR,CAR RADIO, LCD MONITORS s NETWORKING: XDSL, MODEMS,DC-DC MODULES s COMPUTER: PRINTERS, AUDIO/GRAPHIC CARDS, OPTICAL STORAGE, HARD DISK DRIVE s INDUSTRIAL: CHARGERS, CAR BATTERY DC-DC CONVERTERS
N° Pin OUT GND COMP FB VCC Regulator Output. Ground. E/A output for frequency compensation. Feedback input. Connecting directly to this pin results in an output voltage 1.23V. An external resistive divider is required for higher output voltages. Unregulated DC input voltage. FunctionSymbol Rth (j-amb) Parameter Thermal Resistance Junction to ambient
Symbol V4, V5 Ptot Tj Tstg Input Voltage Out pin DC voltage Out pin peak voltage = 0.1µs Maximum output current Analog pins Power dissipation at Tamb 70°C Operating junction temperature range Storage temperature range Parameter Value to 40 int. limit. W °C Unit V
ELECTRICAL CHARACTERISTICS (Tj = 25°C, VCC = 12V, unless otherwise specified.) Specification Referred to Tj from to 125°C.
Symbol VCC RDSON Il fs Parameter Operating input voltage range Mosfet on Resistance Maximum limiting current Switching frequency VCC to 36V Test Condition = 1.5A Duty cycle DYNAMIC CHARACTERISTICS (see test circuit V5 Voltage feedback 4.4V < VCC = 5V, VCC = 12V Min. Typ. Max. Unit V A KHz %
DC CHARACTERISTICS Iqop Iq Total operating quiescent current Quiescent current Duty Cycle = 0; VFB 1.5V mA
ERROR AMPLIFIER VOH VOL Io source Io sink Ib High level output voltage Low level output voltage Source output current Sink output current Source bias current DC open loop gain gm Transconductance RL = Icomp to 0.1mA VCOMP 1.9V 50 VFB = 1V VFB = 1.5V VCOMP = 1.9V; VFB = 1V VCOMP = 1.9V; VFB dB mS
Note (1): Specification over the +125 Tj Temperature range are assured by design, characterization and statistical correlation.
|Related products with the same datasheet|
|Some Part number from the same manufacture ST Microelectronics, Inc.|
|L5972D up to 2A Step Down Switching Regulator|
|L5973 up to 2.5A Step Down Switching Regulator|
|L5973A 2A Switch Step Down Switching Regulator|
|L5973D up to 2.5A Step Down Switching Regulator|
|L5991 Primary Controller With Standby|
|L5993 Constant Power Controller|
|L5994 Adjustable Triple Output Power Supply Controller|
|L5996 5 Bit Dynamic DAC Controller For Mobile Cpu|
|L6000 Single Chip Read & Write Channel|
|L601 Darlington Arrays|
M27C1024-55XB7X : 1 Mbit 64kb X16 uv EPROM And OTP EPROM
M27V401-150B6TR : 4 Mbit 512kb x8 Low Voltage uv EPROM And OTP EPROM
PSD4235G1-70J : Flash In-system-programmable Peripherals For 16-bit MCUs
PSD835F2V-A-12MI : Configurable Memory System on a Chip For 8-bit Microcontrollers
ST6262BB1 : 8-bit Otp/ePROM MCUs With A/D Converter, Auto-reload Timer And EePROM
ST72511R7T1 : 8-bit MCU With Nested Interrupts, EePROM, ADC, 16-bit Timers, 8-bit PWM Art, Spi, Sci, CAN Interfaces
ST72T311R : CISC 8-bit MCU With 8 to 16k Otp/ePROM, 384 to 512 Bytes RAM, ADC, Wdg, Sci, Spi And 2 Timers
STM6780VWB6F : Emitter-Switched Bipolar Transistor
L7820CD2T-TR1 : Positive Voltage Regulators
BTB24-800BWRG : 25 A Standard and Snubberless Triacs
ST92124DV9TB : 8/16-bit Single Voltage Flash MCU Family WITH RAM, E3 Tm(emulated Eeprom), CAN 2.0B AND J1850 BLPD
STR711FZ1H3 : 32-BIT, FLASH, 66 MHz, RISC MICROCONTROLLER, PBGA144 Specifications: Data Bus: 16 Bit ; Life Cycle Stage: ACTIVE ; Clock Speed: 16.5 MHz ; ROM Type: Flash ; Supply Voltage: 3 to 3.6 volts ; I/O Ports: 30 ; Package Type: Other, 10 X 10 MM, 1.70 MM HEIGHT, LFBGA-144 ; Operating Range: Commercial ; Pin Count: 144 ; Operating Temperature: 0 to 70 C (32 to
48Q2001-2R : 60132 Watt DC-DC Converters. Input voltage ranges or 2 isolated outputs kV AC I/O electric strengh test voltage Extremely slim case (4TE wide), fully enclosed Extremely low inrush current, hot swappable Operating ambient temperaturerange 4071 °C with convection cooling Options Options Input voltage Inrush current ETS 300 132-2 refer to selection chart typ. 40 A Efficiency Output.
BP5046-5 : . Parameter Input voltage Output voltage ESD endurance Operating temperature range Storage temperature range Symbol Vi Io Vsurge Topr Tstg Limits Unit V mApk kV °C Symbol Min. Parameter Input voltage range -240 Vi Output voltage -4.6 Vo Output current 0 Io Line regulation - Vr Load regulation - Vl Output ripple voltage - Vp Power conversion effciency.
LX5245CPW : SCSI - Low Voltage Differential (LVD). Scsi - Low Voltage Differential (LVD), Package : Tssop.
PT5046 : Non-Isolated DC-DC Converters. Wide Input Voltage Range 85% Efficiency Internal Over-Temperature Protection Laser-trimmed Output Voltage Soft Start 5-Pin Mount Option (Suffixes & M) The is a series of 3-pin boost-voltage Integrated Switching Regulators (ISRs). These ISRs are designed for use with +5V bus systems that require an additional regulated to +20V with 1A of output current.
RT9168 : Single Output. Iout(mA) = 200 ;; IGND1( GA) = 90 ;; Output Voltage(V) = 1.5~5.0 ;; Vin (Min) = 2.9 ;; Vin (Max) = 7 ;; Accuracy(%) = 2 ;; / 2 = Shdn, Low-noise ;; Packages = SOT-25, SOP-8 ;;.
TOP232-234 : . Design Flexible, EcoSmart®, Integrated Off-line Switcher Lower System Cost, High Design Flexibility eliminate or reduce cost of external components Fully integrated soft-start for minimum stress/overshoot Externally settable accurate current limit Wider duty cycle for more power, smaller input capacitor Line under-voltage (UV) detection: no turn off glitches.
TPS2159 : . The TPS2149 incorporates two power distribution switches and an LDO in one small package, providing a USB bus-powered hub power management solution that saves 60% in board space over typical implementations. The TPS2149 meets USB 2.0 bus-powered hub requirements. An integrated LDO regulates the 5-V bus power down 3.3 V for the USB controller. The two MOSFET.
TPS75418QPWP : ti TPS75418, Fast-transient-response 2-A LDO Voltage Regulator. TPS75225Q, TPS75233Q WITH RESET TPS75425Q, TPS75433Q WITH POWER GOOD FAST-TRANSIENT-RESPONSE 2-A LOW-DROPOUT VOLTAGE REGULATORS 2-A Low-Dropout Voltage Regulator Available 2.5-V, 3.3-V Fixed Output and Adjustable Versions Open Drain Power-On Reset With 100-ms Delay (TPS752xxQ) Open Drain Power-Good (PG) Status Output (TPS754xxQ) Dropout Voltage Typically.
TPS76325 : . 150-mA Low-Dropout Regulator Output Voltage: 1.6 V and Variable Dropout Voltage, Typically 150 mA Thermal Protection Over Current Limitation Less Than 2-µA Quiescent Current in Shutdown Mode to 125°C Operating Junction Temperature Range 5-Pin SOT-23 (DBV) Package The TPS763xx family of low-dropout (LDO) voltage regulators offers the benefits of low-dropout.
MAX16807 : The MAX16807/MAX16808 are integrated, high-efficiency white or RGB LED drivers. They are designed for LCD backlighting and other LED lighting applications with multiple strings of LEDs. The MAX16807/MAX16808's current-mode PWM controller regulates the necessary voltage to the LED array. Depending on the input voltage and LED voltage range, it can be used.
LM20123 : 3A, 1.5MHz PowerWise Synchronous Buck Regulator The LM20123 is a full featured 1.5 MHz synchronous buck regulator capable of delivering up to 3A of continuous output current. The current mode control loop can be compensated to be stable with virtually any type of output capacitor. For most cases, compensating the device only requires two external components,.
TPS61166 : White LED Driver W/ Integrated Power Diode And Fast Burst Dimming Mode The TPS61166 is a boost converter with a 20-V rated integrated switch FET and power diode that drives up to 5 LEDs in series. This device integrates a high side switch FET that can turn on/off the LED current within 1-µs of the applied external PWM signal. The high side switch also.
SMB211 : Programmable Power Manager With Digital Power Control The SMB211 is a highly integrated and flexible power manager designed for use in a wide range of applications from printers and set-top boxes to servers and network equipment. The built-in non-volatile digital programmability allows system designers to custom tailor the device to suit almost any power.
ISL9305H : 3MHz Dual 1.5A Step-Down Converters And Dual Low-Input LDOs With I2C Compatible Interface ISL9305H is an integrated mini Power Management IC (mini- PMIC) for powering low-voltage microprocessor, or applications using a single Li-Ion or Li-Polymer cell battery to power multiple voltage rails. ISL9305H integrates two high-efficiency 3MHz synchronous step-down.
ADP223 : Dual, 300 MA Output, Adjustable, Low Noise, High PSRR Voltage Regulator The 300 mA, dual-adjustable output ADP223 combines high PSRR, low noise, low quiescent current, and low drop out voltage in a voltage regulator that is ideally suited for wireless applications with demanding performance and board space requirements..
CM2830AOIM89 : 300mA CMOS LDO The CM2830/CM2830A family is a positive voltage linear regulator developed utilizing CMOS technology featured low quiescent current (30 Ã‚µA typ.), low dropout voltage, and high output voltage accuracy. Built-in low on-resistance transistor provides low dropout voltage and large output current. A 2.2 Ã‚µF or greater can be used as an output.
FDMF6820A : Extra-Small, High-Performance, High-Frequency DrMOS Module The XSâ„¢ DrMOS family is Fairchildâ€™s next-generation, fully optimized, ultra-compact, integrated MOSFET plus driver power stage solution for high-current, high-frequency, synchronous buck DC-DC applications. The FDMF6820A integrates a driver IC, two power MOSFETs, and a bootstrap Schottky.