LTC3703EGN-5#TRPBF Linear Technology, LTC3703EGN-5#TRPBF Datasheet - Page 8

• Manufacturer Part Number: LTC3703EGN-5#TRPBF
• Description: IC BUCK/BOOST SYNC ADJ 5A 16SSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck), Step-Up (Boost)r

Specifications of LTC3703EGN-5#TRPBF

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.8 ~ 55.8 V
• Current - Output: 5A
• Frequency - Switching: 100kHz ~ 600kHz
• Voltage - Input: 9.3 ~ 60 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

LTC3703-5
FU CTIO AL DIAGRA
OPERATIO
The LTC3703-5 is a constant frequency, voltage mode
controller for DC/DC step-down converters. It is designed
to be used in a synchronous switching architecture with
two external N-channel MOSFETs. Its high operating volt-
age capability allows it to directly step down input voltages
up to 60V without the need for a step-down transformer.
For circuit operation, please refer to the Functional
8
R2
U
MODE/SYNC
R1
V
C
CC
SS
RUN/SS
(<15V)
COMP
V
V
FB
CC
IN
16
12
U
5
1
3
4
0.8V
3.2V
C
VCC
U
4µA
+
+
–
(Refer to Functional Diagram)
OVER
TEMP
OT SD
FB
1V
–
+
÷
DETECT
SYNC
UVSD OTSD
REFERENCE
BANDGAP
W
0.8V
% DC
LIMIT
EXT SYNC
FORCED CONTINUOUS
–
PWM
+
FSET
CHIP
SD
INTERNAL
3.2V V
OSC
0.76V
2
V
+
MIN
CC
RSET
CC
–
0.84V
+
MAX
–
UVLO
UV SD
Diagram of the IC and the circuit on the first page of this
data sheet. The LTC3703-5 uses voltage mode control in
which the duty ratio is controlled directly by the error
amplifier output and thus requires no current sense resis-
tor. The V
is compared to the internal 0.8V reference by the error
amplifier, which outputs an error signal at the COMP pin.
INV
OVERCURRENT
FB
DRIVE
LOGIC
pin receives the output voltage feedback and
–
–
CURRENT
+
+
REVERSE
50mV
±
+
–
12µA
±
GN16
INV
15
14
13
11
10
5
9
6
8
I
BOOST
TG
SW
DRV
BG
BGRTN
INV
GND
MAX
R
CC
MAX
V
37035 FD
CC
D
C
B
B
C
OUT
V
IN
L1
M1
M2
37035fa
V
OUT