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PV88080 Datasheet(PDF) 13 Page - Dialog Semiconductor

Part # PV88080
Description  High Efficiency Advanced Feature 4-Channel PMIC
PDF  102 Pages
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Manufacturer  DIALOG [Dialog Semiconductor]
Direct Link  http://www.dialog-semiconductor.com/
Logo DIALOG - Dialog Semiconductor

PV88080 Datasheet(HTML) 13 Page - Dialog Semiconductor

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PV88080
High Efficiency Advanced Feature 4-Channel PMIC
Datasheet
Revision 1.0
13-Jun-2017
CFR0011-120-00
13 of 102
© 2017 Dialog Semiconductor
3.3.2
Buck Converters / Controller
Buck1 to Buck3 are high efficiency synchronous step down regulators operating at 1 MHz frequency
and providing individual output voltages with +/- 3% accuracy.
The default output voltages of these regulators are loaded from OTP and can be programmed in
5 mV steps. The switching frequency is chosen to be high enough to allow the use of a 1.5 uH
inductor.
The buck converter has an automatic mode where it switches between synchronous mode (PWM)
and sleep mode (PFM) depending on the load current. An internal zero crossing comparator is used
to time the turn-off of the internal MOSFET, thereby removing the need for an external Schottky
diode. The quiescent current for all these buck converters in PFM mode is 25 uA.
Each one of the three buck converters can be individually controlled (through I2C) by dedicated
registers. All buck converter pins deliver high currents except the feedback pin.
Each one of the three buck converters contains a P-MOSFET on the high side and N-MOSFET on
the low side. These two MOSFET devices are integrated inside the PV88080.
All PV88080 buck converters feature a programmable pull down resistors, which can be either
enabled or disabled when the buck converters is powered down.
Table 6: Bucks Summary
Block
VOUT
IOUT
External Components
Control
Buck1
0.75 V - 3.3 V
PWM: 5000 mA
L=1.5 uH / COUT > 60 uF
I2C
Buck2
0.9 V
– 3.6 V
PWM: 2000 mA
L=1.5 uH / COUT > 34 uF
I2C
Buck3
0.9 V
– 3.6 V
PWM: 2000 mA
L=1.5 uH / COUT > 34 uF
I2C
HV Buck
Controller
0.8 V
– 5.25V (VIN <
13.2 V)
1.8 V
– 5.25 V
(VIN > 13.2 V)
>10 A
L=1.5 uH / COUT >130 uF
I2C



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