SC2440TETRT Semtech, SC2440TETRT Datasheet - Page 19

• Manufacturer Part Number: SC2440TETRT
• Description: IC SW REG DUAL 2.5MHZ 16-TSSOP
• Manufacturer: Semtech
• Type: Step-Down (Buck)r

Specifications of SC2440TETRT

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 2
• Current - Output: 2A
• Frequency - Switching: 1.4MHz
• Voltage - Input: 2.8 ~ 20 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP Exposed Pad, 16-eTSSOP, 16-HTSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Power - Output: -
• Other names: SC2440TETR

and
provided that
In Equation (10), C
the output resistance R
POWER MANAGEMENT
Applications Information
2005 Semtech Corp.
v
v
v
COMP
v
OUT
FB
FB
G
G
MA
MA
R
R
R
5
O
1
1
R
R
R
G
1
C
1
Figure 13.
G
R
2
R
MP
sC
5
R
MA
2
2
R
R
R
2
2
Gain
OUT
2
R
5
R
5
O
C
O
1
forms a low frequency pole p
1
6
1
and
1
s
O
sC
R
Bode Plots of Control-to-Ouput, Output-to-Control and the Overall Loop
Gain. Control-to-output transfer function is shown with two poles near
half the switching frequency
of the error amplifier and C
R
sC
1
5
sC
O
R
1
C
R
11
5
5
R
O
6
R
p
R
2
1
5
1
C
11
R
5
T
j (
.
)
R
5
1
C
5
Z
1
R
OUT
n
1
C
(10)
with
1
p
(9)
2
Control-to-Output
Transfer Function
6
C
C
19
S
1
n
.
R
forms a high frequency pole p
component values shown in Figure 1 for the 12V to 3.3V
regulator (1.3MHz),
OUT
R
O
p
p
1
3
Amplifier
1
6
R
R
Transcondu
3 .
5 .
v
O
v
5
1
1
COMP
C
OUT
Krads
C
Mrads
5
6
C
Open
1
15
1
R
1
6 .
5
1
C
c
Loop
4 .
M
6
p
tan
3
K
210
1
1
1
0 .
ce
2
Gain
S
470
Hz
MHz
10
pF
pF
3
280
with R
53
dB
www.semtech.com
SC2440
5
1
. Using the
1
6 .
M