AAT1146IJS-0.6-T1 Analogic Tech, AAT1146IJS-0.6-T1 Datasheet - Page 13

• 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

SwitchReg
Adjustable Output Resistor Selection
For applications requiring an adjustable output voltage,
the 0.6V version can be externally programmed. Resistors
R1 and R2 of Figure 5 program the output to regulate at
a voltage higher than 0.6V. To limit the bias current
required for the external feedback resistor string while
maintaining good noise immunity, the minimum sug-
gested value for R2 is 59kΩ. Although a larger value will
further reduce quiescent current, it will also increase the
impedance of the feedback node, making it more sensi-
tive to external noise and interference. Table 2 summa-
rizes the resistor values for various output voltages with
1146.2009.05.1.7
Figure 2: AAT1146 Evaluation Board
TM
Top Side Layout.
Figure 4: AAT1146 Evaluation Board
w w w . a n a l o g i c t e c h . c o m
Bottom Side Layout.
Fast Transient 400mA Step-Down Converter
R2 set to either 59kΩ for good noise immunity or 221kΩ
for reduced no load input current.
The adjustable version of the AAT1146, combined with
an external feedforward capacitor (C4 in Figure 5),
delivers enhanced transient response for extreme pulsed
load applications. The addition of the feedforward capac-
itor typically requires a larger output capacitor C1 for
stability.
R1 =
⎛
⎝
V
V
Figure 3: Exploded View of Evaluation
OUT
REF
-1 · R2 =
⎞
⎠
Board Top Side Layout.
PRODUCT DATASHEET
⎛
⎝
1.5V
0.6V
AAT1146
- 1 · 59kΩ = 88.5kΩ
⎞
⎠
13