AIC1550 AIC [Analog Intergrations Corporation], AIC1550 Datasheet
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AIC1550
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AIC1550 Summary of contents
Page 1
... The AIC1550 can deliver over 800mA output current. The output voltage can be adjusted from 0.75V to VIN ranging from +2.5V to +6.5V. Other features of the AIC1550 include low quiescent current, low dropout voltage, and a 0.75V reference of ±2% accuracy available in a space-saving 8-pin MSOP package. ...
Page 2
... D1: GS SS12 ORDERING INFORMATION AIC1550XXXX PACKING TYPE TR: TAPE & REEL TB: TUBE PACKAGING TYPE O:MSOP8 C: Commercial Degree P: Lead Free Example: AIC1550COTR In MSOP Package & Taping & Reel Packing Type AIC1550POTR In MSOP Lead Free Package & Taping & Reel Packing Type VIN ...
Page 3
... FB to GND Operating Temperature Range Junction Temperatrue Storage Temperature Range Lead Temperature (Soldering. 10 sec) Absolute Maximum Ratings are those values beyond which the life of a device may be Impaired. TEST CIRCUIT Refer to Typical Application Circuit. AIC1550 -0.3 to +7V .-0.3 to 0.3V -0 +0.3V +0.3V) BP -40°C ~ 85°C 125° ...
Page 4
... LX unconnected FB SHDN = LX = GND, includes LX leakage current V = 5.5V 5. OSC MAX V rising, typical hysteresis is IN 85mV V SHDN , SYNC/MODE, LIM IH V SHDN , SYNC/MODE, LIM IL SHDN , SYNC/MODE, LIM High or low AIC1550 MIN TYP MAX UNITS 2.5 6 REF IN 0.735 0.75 0.765 -1.3 % -50 0. ...
Page 5
... OUT 40 0.1 100 1000 =1.8V) OUT Fig. 4 Load Current vs. Efficiency (V 100 =4. =3.0V OUT 40 0.1 100 1000 =3.0V) OUT AIC1550 V =2. =6. =5. =3. =1.5V OUT 1 10 100 Load Current (mA) Fig. 2 Load Current vs. Efficiency (V =1.5V) OUT (Refer to typical application circuit it ...
Page 6
... AIC1550 (continued) V =3. 100 Temperature (°C) Fig. 8 Reference Voltage vs. Temperature 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Supply Voltage (V) Fig. 10 Frequency vs. Input Voltage V =3. 100 Load Current (mA) Fig ...
Page 7
... LOAD SYNC/MODE=IN Fig. 17 Load Transient Response 100 5.5 6.0 6.5 7.0 0.1 500 750 250 (k Ω ) AIC1550 (continued) PWM/PFM PWM V =3. =1.8V OUT 1 10 100 Load current (mA) Fig. 14 Efficiency vs. Load current =3 Ω Fig. 16 Start-up from Shutdown, R LOAD V =1.8V; OUT I =50mA to 500mA; LOAD SYNC/MODE=GND Fig ...
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... TYPICAL PERFORMANCE CHARACTERISTICS V =3. =200mA to 500mA; LOAD SYNC/MODE=IN Fig. 19 Line Transient Response V =3.6V OUT I =500mA LOAD SYNC/MODE=IN Fig. 21 Switching Waveform =1.8V; OUT V IN =1.8V; AIC1550 (continued) Fig. 20 Short Circuits Protection =3.6V, V =1.8V, I =800mA OUT LOAD Fig. 22 Output Ripple voltage V OUT ...
Page 9
... S lope C urrent Lim parator parator - + C ontrol Logic . ontrol PIN 6: SYNC/MODE- Pin internally Shutdown-Control PIN 7: GND- Adjustable Pin PIN 8: LX- AIC1550 X20 nti- S hoot- T hrough Q 3 Zero C ross - C om parator + Oscillator Sync and Low-Noise, Mode-Control Input ...
Page 10
... Continuous output current of AIC1550 can be upward to 800mA and output voltage can be adjusted from 0.75V to VIN with an input range from 2. voltage divider. AIC1550 also features high efficiency, low dropout voltage, and a 0.75V reference with ±2% accuracy available in a space-saving 8-pin MSOP package. ...
Page 11
... L IN Users can define the acceptable ∆I suitable inductor value. Since AIC1550 can be used in ceramic capacitor application, the component selection will be different from the one for the application above. AIC1550 has a built-in slope compensation, which acitvates when duty cycle is larger than 0.45. The slope Ma, 0.27V/μ ...
Page 12
... Schottky diode and output capacitor, should be kept as small as possible. 3. The routes with large current should be kept short and wide. 4. Logically the large current on the converter, when AIC1550 off, should flow at the same direction. 5. The FB pin should connect to feedback 6. Grounding all components at the same point (5) (6) × ...
Page 13
... Fig. 22 shows the application circuit of AIC1550, and Fig show the layout diagrams of it. 2. Ceramic capacitors application: Of the same AIC1550 application above, except for ceramic capacitor used, Co, R1, and R2 can be calculated as following formulas. And the same values of load current and output voltage at 800mA and 1 ...
Page 14
... Fig. 24 Top Layer Fig. 26 Top Over Layer Fig. 25 Bottom Layer Fig. 27 Bottom Over Layer AIC1550 14 ...
Page 15
... SEE VIEW θ b BASE METAL SECTION A-A AIC1550 MSOP-8 MILLIMETERS MIN. MAX. 1.10 0.05 0.15 0.75 0.95 0.25 0.40 0.13 0.23 2.90 3.10 4.90 BSC 2.90 3.10 0.65 BSC 0.40 0.70 0° 6° ...