User Manual

1.4A current limit
Minimum input voltage 1.8V
Pin-selectable 650
kHz
() or 1.3 MHz () PWM frequency
Adjustable output voltage up to 20 V
Adjustable soft start
Undervoltage lockout
Figure 15. AVCC8V0 []
The output voltage is:
Where:
The supply is enabled after VCC5V0 and AVCC3V3 (see EN_AVCC in
Fig. 16)
Low power: 1.1 mA/amp
Low wideband noise: 2.1 nV/√Hz, 1.4 pA/√Hz
Low 1/f noise:7 nV/√Hz @ 10
Hz (), 13 pA/√Hz @ 10 Hz ()
Low distortion: −105 dBc @ 100 kHz (), VO = 2 V p-p
High speed: 80 MHz (), −3 dB bandwidth (G = +1), 12 V/µs slew rate, 175 ns settling time to 0.1%
Low offset voltage: 0.3 mV maximum
Rail-to-rail output
Power down
Wide supply range: 2.7 V to 12 V
The user power supplies Fig. 15 use Switching Converter in SEPIC DC-to-DC topology. Main features:
V
OUT
= V
FB
⋅ = 8.538 V (21)
R
80
+ R
84
R
84
V
FB
= 1.235 V typical (22)
4.4. AVCC-8V0
The user power supplies Fig. 16 use

ADP1612 Switching Converter in CUK DC-to-DC topology.
IC13 introduces the required inversion for the negative supply.

ADA4841 features: