AAT1154IAS-1.8-T1 AnalogicTech, AAT1154IAS-1.8-T1 Datasheet
AAT1154IAS-1.8-T1
Related parts for AAT1154IAS-1.8-T1
AAT1154IAS-1.8-T1 Summary of contents
Page 1
... General Description The AAT1154 SwitchReg™ member of AnalogicTech™'s Total Power Management™ IC product family. The Step-down switching converter is ideal for applications where high efficiency, small size, and low ripple are critical. Able to deliver 3A with an internal power MOSFET, the current-mode controlled IC provides high efficiency ...
Page 2
Pin Descriptions Pin # Symbol GND VCC Pin Configuration 2 1MHz 3A Buck DC/DC Converter Function Feedback input pin. This pin must be connected to the converter’s output. ...
Page 3
Absolute Maximum Ratings Symbol Description GND GND GND GND EN T Operating Junction Temperature Range J V ESD ...
Page 4
Electrical Characteristics values are 25°C) A Symbol Description V Input Voltage Range IN V Output Voltage Tolerance OUT V Under Voltage Lockout UVLO V Under Voltage Lockout Hysteresis UVLO(HYS) I Quiescent Supply Current Q I Shutdown Current ...
Page 5
Typical Characteristics R vs. Temperature DS( Temperature ( ...
Page 6
Typical Characteristics Line Regulation V =3.3V OUT 0. 3. 3.5 4 4.5 Input Voltage (V) Load Regulation V = 5.0V 3. 0.0 ...
Page 7
Typical Characteristics Inrush and Output Overshoot Characteristic No Load 14 Inductor Current Input 4 2 Output 0.4 0.8 1.2 Time (millisec) Output Ripple I = 3.0A 3.3V, V OUT OUT 4 ...
Page 8
Typical Characteristics Transient Response 3.0A 3.3V, V OUT OUT 100 3x 100 F 6.3V Ceramic TDK P/N C3325X5R0J107M 0 -100 -200 -300 -400 -500 -600 -700 0 100 200 300 Time ( s) Tantalum ...
Page 9
Functional Block Diagram V CC REF FB GND Applications Information Main Control Loop The AAT1154 is a peak current mode buck con- verter. The inner wide bandwidth loop controls the inductor peak current. The inductor current is sensed as it ...
Page 10
Current Limit and Over Temp Protection The AAT1154 over temp and current limit circuitry protects the AAT1154 as well as the external Schottky diode during overload, short circuit and excessive ambient temperature conditions. The junction over temp threshold is 140°C ...
Page 11
Diodes Inc. B340LA ROHM RB050L-40 Micro Semi 5820SM 3 Amp Surface Mount Schottky Diodes Input Capacitor Selection The primary function of the input capacitor is to pro- vide a low impedance loop for the edges of pulsed current drawn by ...
Page 12
Figure 1. AAT1154 Fixed Output Top Side Layout Thermal The losses associated with the AAT1154 output switching MOSFET are due to switching losses and conduction losses. The conduction losses are associated with the R characteristics of the DS(ON) output switching ...
Page 13
Sumida inductor Series CDRH6D38 · 3 1.5 H MHz 1 5.25V · OUT ...
Page 14
Input Capacitor The input capacitor ripple is · · RMS the examples shown ceramic capacitor located as close to the IC ...
Page 15
Vin 2.7V-5.5V C4 100µF rtn Figure 5. AAT1154 Evaluation Board with adjustable output Figure 6. Evaluation Board Top Side 1154.2003.08.0.91 1MHz 3A Buck DC/DC Converter 2.55k AAT1154-1. 0 100 100k FB VP GND ...
Page 16
Capacitors Part Number Manufacturer C4532X5ROJ107M TDK GRM43-2 X5R 107M 6.3 MuRata GRM43-2 X5R 476K 6.3 MuRata GRM42-6 X5R 106K 6.3 MuRata 594D127X_6R3C2T Vishay 595D107X0016C Vishay Inductors Part Number Manufacturer CDRH6D38-4763-T055 Sumida N05D B1R5M Taiyo Yuden NP06DB B1R5M Taiyo Yuden LQH55DN1R5M03 ...
Page 17
... Ordering Information Output Voltage Package 1.0V 1.8V 2.5V 3.3V Package Information 4.90 0.10 0.42 0.09 8 1.27 BSC All dimensions in millimeters. 1154.2003.08.0.91 1MHz 3A Buck DC/DC Converter Marking SO-8 SO-8 SO-8 SO-8 SO-8 0.375 0.125 0.825 0.445 AAT1154 Part Number (Tape and Reel) AAT1154IAS-1.0-T1 AAT1154IAS-1.8-T1 AAT1154IAS-2.5-T1 AAT1154IAS-3.3-T1 45 0.235 0.045 17 ...
Page 18
... AnalogicTech reserves the right to make changes to their products or specifications or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. AnalogicTech warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with AnalogicTech’ ...