Details, datasheet, quote on part number: MC34025D
DatasheetDownload MC34025D datasheet
Find where to buy


Features, Applications

The MC34025 series are high speed, fixed frequency, double­ended pulse width modulator controllers optimized for high frequency operation. They are specifically designed for Off­Line and DC­to­DC converter applications offering the designer a cost effective solution with minimal external components. These integrated circuits feature an oscillator, a temperature compensated reference, a wide bandwidth error amplifier, a high speed current sensing comparator, steering flip­flop, and dual high current totem pole outputs ideally suited for driving power MOSFETs. Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle­by­cycle current limiting, and a latch for single pulse metering. The flexibility of this series allows to be easily configured for either current mode or voltage mode control. 50 ns Propagation Delay to Outputs

Dual High Current Totem Pole Outputs Wide Bandwidth Error Amplifier Fully­Latched Logic with Double Pulse Suppression Latching PWM for Cycle­By­Cycle Current Limiting Soft­Start Control with Latched Overcurrent Reset Input Undervoltage Lockout with Hysteresis Low Start­Up Current (500 µA Typ) Internally Trimmed Reference with Undervoltage Lockout 90% Maximum Duty Cycle (Externally Adjustable) Precision Trimmed Oscillator Voltage or Current Mode Operation to 1.0 MHz Functionally Similar to the UC3825

Error Amp Inverting Input Error Amp Noninverting Input Error Amp Output Clock 16 Vref Clock 4 5 Oscillator 6 7 Latching PWM and Steering Flip Flop 5.1V Reference UVLO 14 VC Output B 15 VCC RT CT Ramp Soft­Start

Vref VCC Output B VC Power Ground Output A Ground Current Limit/ Shutdown
Ramp Error Amp 3 Output Noninverting 2 Input Inverting Input 1 8 Soft­Start
11 Output A Power 12 Ground 9 Current Limit/ Shutdown

Device MC34025DW MC34025P Operating Temperature Range to +70°C Package SO­16L Plastic DIP SO­16L Plastic DIP

Rating Power Supply Voltage Output Driver Supply Voltage Output Current, Source or Sink (Note 1) DC Pulsed (0.5 µs) Current Sense, Soft­Start, Ramp, and Error Amp Inputs Error Amp Output and Soft­Start Sink Current Clock and RT Output Current Power Dissipation and Thermal Characteristics SO­16 Package (Case 751G) Maximum Power Dissipation + 25°C Thermal Resistance, Junction­to­Air DIP Package (Case 648) Maximum Power Dissipation + 25°C Thermal Resistance, Junction­to­Air Operating Junction Temperature Operating Ambient Temperature (Note MC34025 MC33025 Storage Temperature Range Symbol VCC 0.5 2.0 Vin IO ICO V mA Value 30 20 Unit V A

ELECTRICAL CHARACTERISTICS (VCC = 1.0 nF, for typical values + 25°C, for min/max values TA is the operating ambient temperature range that applies [Note 2], unless otherwise noted.)

Characteristic REFERENCE SECTION Reference Output Voltage (IO = 1.0 mA, + 25°C) Line Regulation (VCC 30 V) Load Regulation (IO to 10 mA) Temperature Stability Total Output Variation over Line, Load, and Temperature Output Noise Voltage to 10 kHz, + 25°C) Long Term Stability (TA = +125°C for 1000 Hours) Output Short Circuit Current OSCILLATOR SECTION Frequency + 25°C Line (VCC 30 V) and Temperature (TA = Tlow to Thigh) Frequency Change with Voltage (VCC 30 V) Frequency Change with Temperature (TA = Tlow to Thigh) Sawtooth Peak Voltage Sawtooth Valley Voltage Clock Output Voltage High State Low State kHz fosc fosc/V fosc/T VP VV VOH VOL V Vref Regline Regload TS Vref Vn S ISC V mV mV/°C mV mA Symbol Min Typ Max Unit

NOTES: 1. Maximum package power dissipation limits must be observed. 2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible. Tlow = 0°C for MC34025 Thigh = +70°C for MC34025 Tlow ­ 40°C for MC33025 Thigh = +105°C for MC33025

ELECTRICAL CHARACTERISTICS (VCC = 1.0 nF, for typical values + 25°C, for min/max values TA is the operating ambient temperature range that applies [Note 2], unless otherwise noted.)

Characteristic ERROR AMPLIFIER SECTION Input Offset Voltage Input Bias Current Input Offset Current Open­Loop Voltage Gain (VO 4.0 V) Gain Bandwidth Product (TJ + 25°C) Common Mode Rejection Ratio (VCM 5.5 V) Power Supply Rejection Ratio (VCC 30 V) Output Current, Source (VO 4.0 V) Output Current, Sink (VO 1.0 V) Output Voltage Swing, High State (IO ­ 0.5 mA) Output Voltage Swing, Low State (IO = 1.0 mA) Slew Rate PWM COMPARATOR SECTION Ramp Input Bias Current Duty Cycle, Maximum Duty Cycle, Minimum Zero Duty Cycle Threshold Voltage Pin 3(4) (Pin 0 V) Propagation Delay (Ramp Input to Output, + 25°C) SIFT­START SECTION Charge Current (VSoft­Start 0.5 V) Discharge Current (VSoft­Start 1.5 V) CURRENT SENSE SECTION Input Bias Current (Pin 4.0 V) Current Limit Comparator p Threshold Sh td Shutdown C Comparator t Threshold h ld Propagation Delay (Current Limit/Shutdown to Output, + 25°C) OUTPUT SECTION Output Voltage Low State (ISink = 20 mA) (ISink = 200 mA) High State (ISource = 20 mA) (ISource = 200 mA) Output Voltage with UVLO Activated (VCC 6.0 V, ISink = 0.5 mA) Output Leakage Current (VC 20 V) Output Voltage Rise Time (CL = 1.0 nF, + 25°C) Output Voltage Fall Time (CL = 1.0 nF, + 25°C) UNDERVOLTAGE LOCKOUT SECTION Start­Up Threshold (VCC Increasing) UVLO Hysteresis Voltage (VCC Decreasing After Turn­On) TOTAL DEVICE Power Supply Current Start­Up (VCC 8.0 V) Operating ICC mA Vth(on) VH V VOL VOH VOL(UVLO) µA ns IIB Vth tPLH(in/out) V ns Ichg Idischg µA mA IIB DC(max) DC(min) Vth tPLH(in/out) V ns VIO IIB IIO AVOL GBW CMRR PSRR ISource ISink VOH VOL µA dB MHz mA V V/µs Symbol Min Typ Max Unit

NOTES: 1. Maximum package power dissipation limits must be observed. 2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible. Tlow = 0°C for MC34025 Thigh = +70°C for MC34025 Thigh = +105°C for MC33025 Tlow ­ 40°C for MC33025


Some Part number from the same manufacture
Same catergory

IRF320 : . These are N-Channel enhancement mode silicon gate power field effect transistors. They are advanced power MOSFETs designed, tested, and guaranteed to withstand a specified level of energy in the breakdown avalanche mode of operation. All of these power MOSFETs are designed for applications such as switching regulators, switching convertors, motor drivers,.

IRHQ9110 : Radiation Hardened Power MOSFET Surface Mount (lcc-28): -100v, -2.3a. RADIATION HARDENED POWER MOSFET SURFACE MOUNT (LCC-28) Part Number Radiation Level IRHQ9110 100K Rads (Si) IRHQ93110 300K Rads (Si) RDS(on) ID -2.3A International Rectifier's RAD-HardTM HEXFET® MOSFET technology provides high performance power MOSFETs for space applications. This technology has over a decade of proven performance and reliability in satellite.

SN74AC14DB : Hex Schmitt-trigger Inverters. EPIC TM (Enhanced-Performance Implanted CMOS) Submicron Process Package Options Include Plastic Small-Outline (D), Shrink Small-Outline (DB), and Thin Shrink Small-Outline (PW) Packages, Ceramic Chip Carriers (FK) and Flatpacks (W), and Standard Plastic (N) and Ceramic (J) DIPS The 'AC14 devices contain six independent inverters. The devices perform.

TAJB104J010R : Surface Mount Tantalum Capacitors. TAJ Series - Solid Tantalum Chip Capacitors (EIA Standard) HOW TO ORDER TAJ 016 R Type 2 Case Code: (See table below) 3 Capacitance Code: pF Code: 1st two digits represent significant figures, 3rd digit represents multiplier (number of zeros to follow) 4 Tolerance: M=±20% (J=±5%, consult factory for details) 5 Rated DC Voltage 6 Packaging: R=7" tape.

P2300Z : Solid State Crowbar Devices. 1800 Hurd Drive Irving, Texas 75038 United States of America Phone: +1 972-580-7777 Fax: +1 972-550-1309 Web site: E-mail: Teccor Electronics is the proprietor of the SIDACtor®, Battrax®, and TeleLink® trademarks. All other brand names may be trademarks of their respective companies. Teccor Electronics.

M39006/09 : Wet Tantalum Capacitors, Military Established Reliability, Mil-prf-39006 Qualified Styles Clr65, 69, 79, 81, 90, 91.

LM3S300-IGZ25-C2 : Embedded - Microcontroller Integrated Circuit (ics) Internal Tray 3 V ~ 3.6 V; IC ARM CORTEX M3 MCU 16K 48VQFN. s: Program Memory Size: 16KB (16K x 8) ; RAM Size: 4K x 8 ; Number of I /O: 36 ; Package / Case: 48-VFQFN Exposed Pad ; Speed: 25MHz ; Oscillator Type: Internal ; Packaging: Tray ; Program Memory Type: FLASH ; EEPROM Size: - ; Core Processor:.

MIC2238-G4YML TR : Pmic - Voltage Regulator - Dc Dc Switching Regulator Integrated Circuit (ics) Step-Down (Buck) Yes 1.2V, 1.8V; IC BUCK SYNC DUAL 1.2/1.8V 12MLF. s: Type: Step-Down (Buck) ; Output Type: Fixed ; PWM Type: Current Mode ; Synchronous Rectifier: Yes ; Number of Outputs: 2 ; Voltage - Output: 1.2V, 1.8V ; Current - Output: 800mA ; Frequency - Switching:.

MS3102E20-27SW : Aluminum, Olive Drab Cadmium Plated Panel Mount, Flange Circular Connectors, Interconnect Receptacle, Female Sockets; CONN RCPT 14 POS BOX MNT W/SCKT. s: Connector Type: Receptacle, Female Sockets ; Shell Size - Insert: 20-27 ; Mounting Type: Panel Mount, Flange ; Fastening Type: Threaded ; : - ; Packaging: Bulk ; Number of Positions: 14 ; Termination:.

B-12-4 : Test Lead - Banana, Meter Interface Test And Measurement; CORD PATCH BANANA PLUG 12" YEL. s: Type: Patch Cord ; Configuration: Banana to Banana ; 1st Connector: Banana Plug, Single, Stackable ; 2nd Connector: Banana Plug, Single, Stackable ; Cable Length: 12.0" (304.80mm) ; Contents: 1 Lead, Yellow ; Material - Insulation: Poly-Vinyl Chloride (PVC).

2-1879222-6 : 34.8 Ohm 0.063W, 1/16W Chip Resistor - Surface Mount; RES 34.8 OHM 1/16W 0.1% 0603. s: Resistance (Ohms): 34.8 ; Power (Watts): 0.063W, 1/16W ; Tolerance: ±0.1% ; Packaging: Tape & Reel (TR) ; Composition: Thin Film ; Temperature Coefficient: ±25ppm/°C ; Lead Free Status: Lead Free ; RoHS Status: RoHS Compliant.

MAX16050EVKIT+ : Eval And Demo Board And Kit Programmers, Development System; EVAL KIT FOR MAX16050. s: Main Purpose: Power Management, Power Supply Supervisor/Tracker/Sequencer ; Primary Attributes: - ; Secondary Attributes: - ; Supplied Contents: Board ; Utilized IC / Part: MAX16050 ; Embedded: - ; Lead Free Status: Lead Free ; RoHS Status: RoHS Compliant.

AD830JRZ-REEL : 1 CHANNEL, VIDEO AMPLIFIER, PDSO8. s: Bandwidth: 85 MHz ; Supply Voltage (VS): 4 to 16.5 volts ; Operating Temperature: 0 to 70 C (32 to 158 F) ; Package Type: SOIC, MS-012AA, SOIC-8 ; Number of Devices: 1.

284980 : 64 CONTACT(S), FEMALE, STRAIGHT TWO PART EURO CONNECTOR, SOLDER. s: Connector Type: TWO PART EURO CONNECTOR ; Gender: Female ; Termination Types: SOLDER ; Number of Contacts: 64 ; RoHS Compliant: RoHS.

0-C     D-L     M-R     S-Z