at1792 Aimtron Technology, at1792 Datasheet
at1792
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at1792 Summary of contents
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... Tel: 886-3-563-0878 Fax: 886-3-563-0879 4/11/2008 VER:1.0 2A/18V/300KHz Step-Down Voltage Regulator Description AT1792 is a voltage-mode PWM step-down DC-DC converter capable of driving loads over a wide input supply range with excellent line and load regulation characteristics. High efficiency is obtained through the use of a low Rds(on) P-channel power switch ...
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... COMP GND FB Package AT1792S, Date Code with one bottom line Description No Connect Power Input. IN supplies power to the IC and Step-down converter switch. IN must be bypassed with a ceramic 0.1uF capacitor. Power Switching Output. Ground. Feedback Input. Connect a resistive divider from switching output ground. ...
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... VER:1.0 2A/18V/300KHz Step-Down Voltage Regulator *1 Rated Value -0 -0 IN+1 -0 105 620 150 260 -65~+150 HBM 2 MM 200 Values Min. Typ. 4.75 12 -20 +25 WWW: Email: 3 AT1792 unit °C/W mW °C °C ° Unit Max +85 ℃ http://www.aimtron.com.tw service@aimtron.com.tw ...
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... FB FB Min. On-time>0.5µs T =+25° FB=1.0V MAIN D FB=1.5V MIIN R I =2A SW-DS(ON IN=13.5V,V =GND EN=0V 0 A<I < 2.0A SW 4.75V < IN<18V Hysteresis 150mV EN=0V WWW: Email: 4 AT1792 =+25℃, unless otherwise noted) Min. Typ. Max. Units 4. 3.8 4.2 4 700 - 300 330 KHz - 32 - KHz 1.206 1.225 1.244 V 1 ...
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... Typical Application Circuit 4.75V~15V 220µF 15V~18V 470µF 7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 Fax: 886-3-563-0879 4/11/2008 VER:1.0 2A/18V/300KHz Step-Down Voltage Regulator *C2 must be closed to the IC *C2 must be closed to the IC WWW: Email: 5 AT1792 http://www.aimtron.com.tw service@aimtron.com.tw ...
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... Tel: 886-3-563-0878 Fax: 886-3-563-0879 4/11/2008 VER:1.0 2A/18V/300KHz Step-Down Voltage Regulator 5.15 5.10 5.05 5.00 4.95 I =500mA,L=22uH OUT 4. Efficiency VS. Load Current V =5V OUT V =3.3V OUT V 1 Load Current(A) WWW: 6 AT1792 Load regulation V =12V,L=22uH IN 0.5 1 1 =12V,L=22uH IN 10 http://www.aimtron.com.tw service@aimtron.com.tw Email: 2 ...
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... VER:1.0 2A/18V/300KHz Step-Down Voltage Regulator Load Transient Response =5.0V, L=22uH, I =500mA to 2A OUT OUT (AC), CH4:I , Time:200µs/div OUT OUT Load Transient Response =5.0V, L=22uH, I =500mA to 2A OUT OUT (AC), CH4:I , Time:200µs/div OUT OUT WWW: Email: 7 AT1792 C4=1µF C4=1µF http://www.aimtron.com.tw service@aimtron.com.tw ...
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... VER:1.0 2A/18V/300KHz Step-Down Voltage Regulator Load Transient Response =3.3V, L=22uH, I =500mA to 2A OUT OUT (AC), CH4:I , Time:200µs/div OUT OUT Load Transient Response =3.3V, L=22uH, I =500mA to 2A OUT OUT (AC), CH4:I , Time:200µs/div OUT OUT WWW: Email: 8 AT1792 C4=1µF C4=1µF http://www.aimtron.com.tw service@aimtron.com.tw ...
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... When EN control is not required that it should be left open circuited. Soft-Start AT1792 is built-in soft-start function. When power up, after input voltage is above the under-voltage lockout threshold, then soft-start allows a gradual increase of COMP voltage to get to a steady state operating point. Therefore, reducing input surge currents. During this time, the COMP voltage increases and the output duty cycle is allowed to increase from zero to the value required for regulation ...
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... Cycle-by-Cycle Over-Current Protection The AT1792 provides cycle-by-cycle over-current protection. Current limit is accomplished using a separate dedicated comparator. If the current sense amplifier output voltage is larger than current-limited threshold level, it will be immediately turned off power MOS. The current-limit feature protects against a hard short or over current fault at the output ...
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... No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 Fax: 886-3-563-0879 4/11/2008 VER:1.0 2A/18V/300KHz Step-Down Voltage Regulator − × ∆ × OSC . PEAK WWW: Email: 11 AT1792 http://www.aimtron.com.tw service@aimtron.com.tw ...
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... OSC For low ESR ceramic capacitors, the output ripple is dominated by the charging or discharging of the output capacitor. 7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 Fax: 886-3-563-0879 4/11/2008 VER:1.0 2A/18V/300KHz Step-Down Voltage Regulator WWW: Email: 12 AT1792 http://www.aimtron.com.tw service@aimtron.com.tw ...
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... In addition the capacitance and the ESR value create a zero. These frequency response effects together with the internal frequency compensation circuitry of AT1792 modify the gain and phase shift of the closed loop system. ...
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... No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 Fax: 886-3-563-0879 4/11/2008 VER:1.0 2A/18V/300KHz Step-Down Voltage Regulator MILLIMETERS MAX MIN 0.197 4.80 0.158 3.80 0.244 5.80 BSC 1.27 BSC 0.020 0.33 0.010 0.10 0.069 1.35 0.019 0.28 0.010 0.19 0.050 0. WWW: Email: 14 AT1792 NOTES MAX 5.00 - 4. 0.51 - 0.25 - 1.75 - 0.48 0.25 1. http://www.aimtron.com.tw service@aimtron.com.tw ...
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... Fax: 886-3-563-0879 15 AT1792 Pb-Free Assembly Large Body Small Body Pkg. thickness Pkg. thickness ≥2.5mm or Pkg. <2.5mm or Pkg. 3 volume ≥350mm 3 volume <350mm 3° ...