MAX1565ETJ+T Maxim Integrated Products, MAX1565ETJ+T Datasheet - Page 23

• 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

Figure 9. ±15V Output Using a Boost with Charge-Pump
Inversion
Figure 10. +15V and -7.5V CCD Bias without Transformer
TO V
BATT
AUX_
PWM
(PARTIAL)
MAX1565
OUTSU
1µF
DL_
FB_
10µH
______________________________________________________________________________________
L1
Q1
TO V
D2
BATT
Small, High-Efficiency, Five-Channel
1µF
1µF
C2
C1
AUX_
PWM
D1
(PARTIAL)
MAX1565
Digital Still Camera Power Supply
OUTSU
D3
1µF
FB_
DL_
R1
1MΩ
90.9kΩ
10µH
R2
C3
1µF
OUT
Q1
V
+15V
20mA
V
-15V
10mA
OUT+
OUT-
IN
+1.25V
MAX1616
1µF
1µF
SHDN
GND
FB_
When the MOSFET turns on, C1 discharges through
D3, thereby charging C3 to V
across D3 to create roughly the same voltage as
V
If different magnitudes are required for the positive and
negative voltages, a linear regulator can be used at
one of the outputs to achieve the desired voltages. One
such connection is shown in Figure 10. This circuit is
somewhat unique in that a positive output linear regula-
tor is able to regulate the negative output. It does this
by controlling the charge to the flying capacitor rather
than directly regulating at the output.
The MAX1801 is a 6-pin SOT slave DC-to-DC controller
that can be connected to generate additional output
voltages. It does not generate its own reference or
oscillator. Instead, it uses the reference and oscillator
of the MAX1565 (Figure 11). The MAX1801 controller
operation and design are similar to that of a MAX1565
AUX controller. All comments in the Auxiliary Controller
Component Selection section also apply to add-on
MAX1801 slave controllers. For more details, refer to
the MAX1801 data sheet.
OUT
1µF
1MΩ
90.9kΩ
+ at V
OUT
+15V
20mA
1µF
- but with inverted polarity.
110kΩ
549kΩ
Adding a MAX1801 Slave
-7.5V
20mA
OUT
- minus the drop
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