LTC1266ACS#PBF Linear Technology, LTC1266ACS#PBF Datasheet - Page 17

• Manufacturer Part Number: LTC1266ACS#PBF
• Description: IC REG CNTRLR N/PCH MOSFET16SOIC
• Manufacturer: Linear Technology
• Type: Step-Down (Buck), Step-Up (Boost)r

Specifications of LTC1266ACS#PBF

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: Adjustable
• Current - Output: 50mA
• Frequency - Switching: 400kHz
• Voltage - Input: 3.5 ~ 18 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

APPLICATIO S I FOR ATIO
3. Are the SENSE
minimum PC trace spacing? The 1000pF capacitor be-
tween Pins 8 and 9 should be as close as possible to the
LTC1266.
4. Does the (+) plate of C
topside MOSFET as closely as possible? This capacitor
provides the AC current to the topside MOSFET.
5. A 0.1 F to 1 F decoupling capacitor connected be-
tween V
TYPICAL APPLICATIO S
IN
(Pin 5) and ground is optional, but is sometimes
–
*
and SENSE
DALE LPT4545-A001
COILTRONICS CTX10-4
U
BINH
C
220pF
T
U
IN
connect to the source of the
+
R
1k
+
C
leads routed together with
C
3300pF
C
Figure 11. Low Dropout, 3.3V/3A High Efficiency Regulator
U
1 F
W
1
2
3
4
5
6
7
8
(Layout Assist Schematics)
TDRIVE
PWR V
PINV
BINH
V
C
I
SENSE
TH
IN
T
LTC1266-3.3
U
IN
–
1000pF
SENSE
BDRIVE
LB
PGND
SGND
SHDN
LB
OUT
NC
IN
+
16
15
14
13
12
11
10
9
helpful in eliminating instabilities at high input voltage and
high output loads.
6. Is the shutdown (Pin 11) actively pulled to ground
during normal operation? The shutdown pin is high im-
pedance and must not be allowed to float. The select (Pins
3 and 4) are also high impedance and must be tied high or
low depending on the application.
SHUTDOWN
Si9410DY
Si9430DY
L*
10 H
LTC1266-3.3/LTC1266-5
R
0.033
SENSE
(V
IN(MIN)
D1
MBRS140T3
+
= 3.5V IF I
C
220 F
10V
2
V
3.3V
3A
3.9V TO 18V
OUT
OUT
+
V
1266 F11
IN
C
100 F
25V
LOAD
IN
< 0.8A)
LTC1266
17