MAX1567ETL+ Maxim Integrated Products, MAX1567ETL+ Datasheet - Page 23

• Manufacturer Part Number: MAX1567ETL+
• Description: IC DGTL CAM PWR-SUP 6CH 40TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX1567ETL+

• Applications: Controller, Digital Camera
• Voltage - Input: 0.7 ~ 5.5 V
• Number Of Outputs: 7
• Voltage - Output: 1.25 ~ 5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 40-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SDOK pulls low when the step-down has successfully
completed soft-start. SDOK goes high impedance in
shutdown, overload, and thermal limit. A typical use for
SDOK is to drive a P-channel MOSFET that connects
3.3V power to the CPU I/O after the CPU core is pow-
ered up (Figure 15), thus providing safe sequencing in
hardware without system intervention.
A A U U X X 1 1 O O K K pulls low when the AUX1 controller has suc-
cessfully completed soft-start. AUX1OK goes high
impedance in shutdown, overload, and thermal limit. A
typical use for AUX1OK is to drive a P-channel MOSFET
Figure 10. Regulated -7.5V Negative CCD (Bias is provided by
conventional inverter (works only with the MAX1567).)
Figure 11. ±15V Output Using an AUX-Driven Boost with
Charge-Pump Inversion
TO V
BATT
AUX_
PWM
(PARTIAL)
MAX1566
MAX1567
INVERTING
(PARTIAL)
AUX2
PVSU
PWM
MAX1567
1µF
DL_
FB_
INDL2
10µH
______________________________________________________________________________________
L1
DL2
FB2
REF
Q1
D2
Six-Channel, High-Efficiency, Digital
TO V
1µF
1µF
C2
C1
D1
BATT
D3
R1
1MΩ
90.9kΩ
R
R
R2
TOP
REF
C3
1µF
-7.5V
100mA
V
+15V
20mA
V
-15V
10mA
OUT+
OUT-
Camera Power Supplies
that connects 5V power to the CCD after the 15V CCD
bias (generated by AUX1) is powered up (Figure 16).
SCF goes high (high impedance, open drain) when
overload protection occurs. Under normal operation,
SCF pulls low. SCF can drive a high-side P-channel
MOSFET switch that can disconnect a load during
power-up or when a channel turns off in response to a
logic command or an overload. Several connections
are possible for SCF. One is shown in Figure 17 where
SCF provides load disconnect for the step-up on fault
and power-up.
Figure 12. +15V and -7.5V CCD Bias Without Transformer
Using Boost with a Diode-Capacitor Charge Pump (A positive-
output linear regulator (MAX1616) can be used to regulate the
negative output of the charge pump.)
NOTE: THIS CIRCUIT CAN OPERATE WITH AUX1, AUX2, OR AUX3 ON THE MAX1566,
AND WITH AUX1 OR AUX3 ON THE MAX1567. TO USE AUX3, FB3L = GND,
AND FB3H IS USED FOR FEEDBACK.
MAX1566/MAX1567
AUX_
PWM
TO V
(PARTIAL)
BATT
PVSU
FB_
DL_
OUT
IN
+1.25V
MAX1616
SHDN
GND
FB_
+15V
20mA
-7.5V
20mA
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