AAT1146IJS-0.6-T1 Analogic Tech, AAT1146IJS-0.6-T1 Datasheet - Page 9

• Manufacturer Part Number: AAT1146IJS-0.6-T1
• Description: Switching Converters, Regulators & Controllers Fast Transient 400mA DC/DC Converter
• Manufacturer: Analogic Tech

Specifications of AAT1146IJS-0.6-T1

• Output Voltage: 0.6 V (Adj.)
• Output Current: 400 mA (Max)
• Input Voltage: 2.7 V
• Switching Frequency: 1 MHz
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SC70JW-8
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Functional Block Diagram
SwitchReg
Functional Description
The AAT1146 is a high performance 400mA 1.4MHz
monolithic step-down converter. It has been designed
with the goal of minimizing external component size and
optimizing efficiency over the complete load range.
Apart from the small bypass input capacitor, only a small
L-C filter is required at the output. Typically, a 4.7μH
inductor and a 4.7μF ceramic capacitor are recommend-
ed (see table of values).
The fixed output version requires only three external
power components (C
sion can be programmed with external feedback to any
voltage, ranging from 0.6V to the input voltage. An addi-
1146.2009.05.1.7
TM
EN
Note: For adjustable version, the internal feedback divider is omitted and the OUT pin is tied directly
to the internal error amplifier.
IN
, C
OUT
Reference
, and L). The adjustable ver-
Voltage
INPUT
Amp
Err
See note
.
w w w . a n a l o g i c t e c h . c o m
OUT
Fast Transient 400mA Step-Down Converter
tional feed-forward capacitor (C
the external feedback to provide improved transient
response (see Figure 1).
At dropout, the converter duty cycle increases to 100%
and the output voltage tracks the input voltage minus
the R
The input voltage range is 2.7V to 5.5V. The converter
efficiency has been optimized for all load conditions,
ranging from no load to 400mA.
The internal error amplifier and compensation provides
excellent transient response, load, and line regulation.
Soft start eliminates any output voltage overshoot when
the enable or the input voltage is applied.
DSON
Logic
drop of the P-channel high-side MOSFET.
DH
DL
PRODUCT DATASHEET
VIN
AAT1146
FF
) can also be added to
LX
PGND
AGND
9