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UC3383 Dataheets PDF



Part Number UC3383
Manufacturers Unisonic Technologies
Logo Unisonic Technologies
Description STEP-UP DC/DC CONVERTERS
Datasheet UC3383 DatasheetUC3383 Datasheet (PDF)

UNISONIC TECHNOLOGIES CO., LTD UC3383 PFM CONTROLLED, STEP-UP DC/DC CONVERTERS (VARIABLE DUTY RATIO)  DESCRIPTION The UTC UC3383 Series are PFM step-up DC/DC switching converter. The UTC UC3383 can support both large and small currents. It automatically switches duty ratio (45%/75%) when it senses changes in load. Both built-in and external transistor types include 5-pin and 3-pin packages, which are provided with either a CE (chip enable) function that reduces power consumption during shut-dow.

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UNISONIC TECHNOLOGIES CO., LTD UC3383 PFM CONTROLLED, STEP-UP DC/DC CONVERTERS (VARIABLE DUTY RATIO)  DESCRIPTION The UTC UC3383 Series are PFM step-up DC/DC switching converter. The UTC UC3383 can support both large and small currents. It automatically switches duty ratio (45%/75%) when it senses changes in load. Both built-in and external transistor types include 5-pin and 3-pin packages, which are provided with either a CE (chip enable) function that reduces power consumption during shut-down mode, or a VDD pin function (separated power and voltage detect pins).  FEATURES * Output Voltage Range: 2.0V~7.0V in 0.1V Increments * Operating (Start-up) Voltage Range: 0.9V~10V * Highly Accurate: Set-up Voltage ±2.5% * Maximum Oscillator Frequency (Max Fosc1): 180kHz (±15%) * Variable Duty Ratio: 45%/75% (±5%) * Both Switching Transistor Built-in and External Types are Available * 5-Lead Package Offer Chip Enable or Independent VOUT Pin Option. CMOS IC 4 5 3 12 SOT-25 1 SOT-89  RDERING INFORMATION Ordering Number Lead Free Halogen Free Package UC3383L-xx-AB3-R UC3383G-xx-AB3-R SOT-89 UC3383L-xx-AF5-R UC3383G-xx-AF5-R SOT-25 Note: Pin Assignment: NC: No Connection CE: Chip Enable xx: Output Voltage, refer to Marking Information. Pin Assignment 1234 VSS VOUT Lx - CE VOUT NC VSS 5 Lx Packing Tape Reel Tape Reel UC3383G-xx-AB3-R (1)Packing Type (2)Package Type (3)Output Voltage Code (4)Green Package (1) R: Tape Reel (2) AB3: SOT-89, AF5: SOT-25 (3) xx: refer to Marking Information (4) G: Halogen Free and Lead Free, L: Lead Free www.unisonic.com.tw Copyright © 2019 Unisonic Technologies Co., Ltd. 1 of 14 QW-R502-032.M UC3383  MARKING INFORMATION PACKAGE SOT-25 SOT-89 VOLTAGE CODE 20:2.0V 25:2.5V 26:2.6V 27:2.7V 28:2.8V 30:3.0V 31:3.1V 32:3.2V 33:3.3V 36:3.6V 37:3.7V 40:4.0V 45:4.5V 50:5.0V  PIN DESCRIPTION PIN NO. SOT-25 SOT-89 122 341 53 PIN NAME CE VOUT NC VSS Lx CMOS IC MARKING 54 H3 1 23 Voltage Code L: Lead Free G: Halogen Free Date Code XX UC3383 123 Voltage Code L: Lead Free G: Halogen Free FUNCTION Chip Enable Output voltage monitor, IC internal power supply No Connection Ground Switch  BLOCK DIAGRAM UTC UC3383 VDD is internally connected to the VOUT pin. VDD Lx VLx limiter VREF 2 step PFM Control + VSS OSC 100/180kHz - Chip Enable + ~5mV - VOUT CE Note: The CE pin is only used with the 5-Lead Package. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 14 QW-R502-032.M UC3383 CMOS IC  ABSOLUTE MAXIMUM RATINGS (TA=25°С, unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT VOUT Input Voltage VOUT 12 V Lx pin Voltage VLx 12 V CE Input Voltage VCE 12 V VDD Input Voltage VDD 12 V Lx pin Current ILX 400 mA Power Dissipation SOT-89 SOT-25 PD 500 mW 250 mW Operating Junction Temperature TJ +125 °C Ambient Operating Temperature TOPR -30 ~ +80 °C Storage Temperature TSTG -40 ~ +125 °C Note Absolute maximum ratings are those values beyond which the device.


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