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LT8349ACBZ-R7 Scheda tecnica(PDF) 7 Page - Analog Devices

Il numero della parte LT8349ACBZ-R7
Spiegazioni elettronici  8V, 12A, 2-Phase Low IQ Synchronous Boost Converter
PDF  29 Pages
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

LT8349ACBZ-R7 Scheda tecnica(HTML) 7 Page - Analog Devices

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Data Sheet
LT8349
analog.com
Rev B
7 of 29
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
Figure 3. Pin Configuration
Table 3. Pin Descriptions
PIN
NAME
DESCRIPTION
A1
RT
A resistor is tied between RT and SGND to set the switching frequency.
A2
FB
Feedback Input Pin. This pin receives the feedback voltage from the external resistor
divider between VOUT and SGND. FB pin is one input to the error amplifier of the output
voltage control loop.
A3
VIN
Input Supply Pin. This pin provides supply for internal drivers and control circuits. This
pin must be decoupled with a 1µF minimum low ESR ceramic capacitor to the ground
plane. Place the VIN bypass capacitor close to the VIN pin.
A4
VC
Error Amplifier Output and Switching Regulator Compensation Pin. Connect this pin to
appropriate external components to compensate the regulator loop frequency
response.
A5
SGND
Signal Ground. Connect SGND to PGND on the PCB with low impedance.
B1
BST1
This pin is used to provide a gate drive voltage to the top side power switch of channel
1. Place a 0.1µF bootstrap capacitor between BST1 and SW1 pins and close to the IC.
B2
SYNC/MODE
External Synchronization Input and Mode Selection Pin. This pin allows five selectable
modes for optimization of performance.
Where the selectable modes of operation are:
Burst = low IQ, low output ripple operation at light loads
WLCSP PACKAGE
CB-35-4
1.845mm × 2.545mm × 0.455mm
JEDEC BOARD:
θJA = 38.7°C/W, θJB = 12.3°C/W,
DEMO BOARD:
θJA = 28.8°C/W, ΨJB = 11.8°C/W
LT8349
TOP VIEW
(BALL SIDE DOWN)
Not to Scale
A
B
C
D
E
F
1
2
3
4
5
G
VIN
RT
SW2
SW2
SYNC
SW2
FB
PGND
VOUT
VOUT
VOUT
VOUT
BST1
SW1
SW1
SW1
PGND
PGND
PGND
EN
VC SGND
BST2
VOUT
SW1
SW2
ISET
VOUT
VOUT
VOUT
SW2
PGND
SW1
VOUT
VOUT



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