MAX1565ETJ+T Maxim Integrated Products, MAX1565ETJ+T Datasheet - Page 25

• Manufacturer Part Number: MAX1565ETJ+T
• Description: IC DGTL CAM PWR-SUP 5CH 32TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX1565ETJ+T

• Applications: Converter Controller, Digital Cameras
• Voltage - Input: 0.7 ~ 5.5 V
• Number Of Outputs: 5
• Voltage - Output: 3.3V, 1.25 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Good PC board layout is important to achieve optimal
performance from the MAX1565. Poor design can
cause excessive conducted and/or radiated noise.
Conductors carrying discontinuous currents, and any
high-current path should be made as short and wide as
possible. A separate low-noise ground plane containing
the reference and signal grounds should connect to the
power-ground plane at only one point to minimize the
effects of power-ground currents. Typically, the ground
planes are best joined right at the IC.
Keep the voltage feedback network very close to the
IC, preferably within 0.2in (5mm) of the FB_ pin. Nodes
with high dV/dt (switching nodes) should be kept as
small as possible and should be routed away from
high-impedance nodes such as FB_. Refer to the
MAX1565EVKIT evaluation kit data sheet for a full PC
board example.
______________________________________________________________________________________
Designing a PC Board
Small, High-Efficiency, Five-Channel
Digital Still Camera Power Supply
TRANSISTOR COUNT: 9420
PROCESS: BiCMOS
Figure 13. Setting OUTSD for Outputs Below 1.25V
3.3V
V
SU
100kΩ
OUTSUA
OUTSUB
FBSELSD
R3
CURRENT-MODE
FBSD
STEP-DOWN
V
1.25V
(PARTIAL)
MAX1565
FBSD
R2
100kΩ
56kΩ
R1
Chip Information
PGNDA
LXSD
INSD
4.7µH
22µF
10µF
V
0.8V
SD
25