MAX1584 Datasheet, PDF (26/29 Pages) Maxim Integrated Products – 5-Channel Slim DSC Power Supplies

5-Channel Slim DSC Power Supplies
MAX1585
(PARTIAL)
INDL2
DL2
AUX2
INVERTING
PWM
FB2
REF
TO V_BATT
-7.5V
100mA
R_TOP
R_REF
TO V_BATT
AUX_
FB_
PWM
PVSU
DL_
MAX1584/MAX1585
(PARTIAL)
IN
SHDN
GND
+15V
20mA
-7.5V
20mA
Figure 8. Regulated -7.5V Negative CCD Bias Provided by
Conventional Inverter (MAX1585 Only)
TO V_BATT
L1
10µH
1µF
D2
C2
1µF
AUX_
FB_
PWM
PVSU
DL_
Q1
C1
1µF
D1
R1
1MΩ
V_OUT+
+15V
20mA
R2
90.9kΩ
D3
V_OUT-
-15V
C3 _10mA
1µF
MAX1584
MAX1585
(PARTIAL)
NOTE: THIS CIRCUIT CAN OPERATE WITH AUX1
OR AUX2 ON THE MAX1584, AND WITH AUX1 ON THE MAX1585.
Figure 9. ±15V Output from AUX-Driven Boost with Charge-
Pump Inversion
Adding a MAX1801 Slave
The MAX1801 is a 6-pin SOT slave DC-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 MAX1584/MAX1585 (Figure 12).
OUT
FB_
+1.25V
MAX1616
NOTE: THIS CIRCUIT CAN OPERATE WITH AUX1
OR AUX2 ON THE MAX1584, AND WITH AUX1 ON THE MAX1585.
Figure 10. +15V and -7.5V CCD Bias Without Transformer from
AUX-Driven Boost and Charge Pump. A positive linear regula-
tor (MAX1616) regulates the negative output of the charge
pump.
INPUT
1-CELL
Li+
V_SU
PV PVSU
DL_
PART OF
MAX1584
MAX1585
(PARTIAL) _{FB_}
L1
L2
D1
C2
Q1
OUTPUT
3.3V
R1
R2
NOTE: THIS CIRCUIT CAN OPERATE WITH AUX1
OR AUX2 ON THE MAX1584, AND WITH AUX1 ON THE MAX1585.
Figure 11. SEPIC Converter for Additional Boost-Buck Channel
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