MAX1565ETJ+ Maxim Integrated Products, MAX1565ETJ+ Datasheet - Page 10

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

Specifications of MAX1565ETJ+

• 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

Small, High-Efficiency, Five-Channel
Digital Still Camera Power Supply
10
PIN
10
11
12
13
14
15
16
17
18
19
20
21
22
23
8
9
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FBSE LS U
FBSE LS D
COMPSU
OUTSUA
FBSEL1
PGNDB
NAME
ONSU
SDOK
FBSD
FBSU
LXSU
ON1
ON2
ON3
OSC
REF
Step-Down Converter Feedback Input. For a 1.5V output, short FBSELSD to GND and connect FBSD to
OUTSD. For other voltages, short FBSELSD to OUTSU and connect a resistive voltage-divider from OUTSD
to FBSD to GND. The FBSD feedback threshold is 1.25V. This pin is high impedance in shutdown.
Auxiliary Controller 1 On/Off Control Input. Drive ON1 high to turn on. This pin has an internal 330kΩ
pulldown resistor. ON1 cannot start until OUTSU is in regulation.
Auxiliary Controller 2 On/Off Control Input. Drive ON2 high to turn on. This pin has an internal 330kΩ
pulldown resistor. ON2 cannot start until OUTSU is in regulation.
Auxiliary Controller 3 On/Off Control Input. Drive ON3 high to turn on. This pin has an internal 330kΩ
pulldown resistor. ON3 cannot start until OUTSU is in regulation.
Step-Up Converter On/Off Control. Drive ONSU high to turn on the step-up converter. All other control pins
are locked out until 2ms after the step-up output has reached its final value. This pin has an internal 330kΩ
resistance to GND.
Reference Output. Bypass REF to GND with a 0.1µF or greater capacitor. The maximum allowed load on
REF is 200µA. REF is actively pulled to GND when all converters are shut down.
Step-Up Converter Feedback Input. To regulate OUTSU to 3.35V, connect FBSELSU to GND. FBSU may be
connected to OUTSU or GND. For other output voltages, connect FBSELSU to OUTSU and connect a
resistive voltage-divider from OUTSU to FBSU to GND. The FBSU feedback threshold is 1.25V. This pin is
high impedance in shutdown.
Step-Up Converter Compensation Node. Connect a series RC from COMPSU to GND to compensate the
control loop. COMPSD is pulled to GND in normal shutdown and during thermal shutdown (see the Step-
Down Compensation section).
Step-Up Feedback Select Pin. With FBSELSU = GND, OUTSU regulates to 3.35V. With FBSELSU = OUTSU,
FBSU regulates to a 1.25V threshold for use with external feedback resistors. This pin is high impedance in
shutdown.
Step-Down Feedback Select Pin. With FBSELSD = GND, FBSD regulates to 1.5V. With FBSELSD = OUTSU,
FBSD regulates to 1.25V for use with external feedback resistors. This pin is high impedance in shutdown.
Auxiliary Controller 1 Feedback Select Pin. With FBSEL1 = GND and FB1 regulates to 5V. With FBSEL1 =
OUTSU, FB1 regulates to 1.25V for use with external feedback resistors. This pin is high impedance in
shutdown.
Oscillator Control. Connect a timing capacitor from OSC to GND and a timing resistor from OSC to OUTSU
to set the oscillator frequency between 100kHz and 1MHz. This pin is high impedance in shutdown.
Power Ground. Connect PGNDA and PGNDB together and to GND with short trace as close to the IC as
possible.
Step-Up Converter Power-Switching Node. Connect LXSU to the step-up converter inductor. LXSU is high
impedance in shutdown.
Step-Up Converter Output. OUTSUA is the power output of the step-up converter. Connect OUTSUA to
OUTSUB at the IC.
This open-drain output goes high impedance when the step-down has successfully completed soft-start.
FUNCTION
Pin Description (continued)