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ADP2301-EVALZ

P1-P3P4-P6P7-P9P10-P12
UG-179 Evaluation Board User Guide
Rev. 0 | Page 4 of 12
Measuring Output Voltage Ripple
To observe the output voltage ripple, place an oscilloscope probe
across the output capacitor (C3 or C4) with the probe ground
lead at the negative (−) capacitor terminal and the probe tip at
the positive (+) capacitor terminal. Set the oscilloscope to ac,
1 mV/division, and 1 μs/division time base, 20 MHz bandwidth.
The standard oscilloscope probe has a long wire ground clip.
For high frequency measurements, this ground clip picks up
high frequency noise and injects it into the measured output
ripple. Make sure to keep the ground lengths on the
oscilloscope probe as short as possible to get a clean voltage
ripple measurement.
Varying the Output voltage
The ADP2300/ADP2301 demonstration board output is preset
to 3.3 V; however, the output voltage can be adjusted to other
output voltages using the following equation:
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
+×=
4
2
1V800.0
R
R
V
OUT
Evaluation Board User Guide UG-179
Rev. 0 | Page 5 of 12
TYPICAL PERFORMANCE CHARACTERISTICS
I
OUT
(A)
40
50
60
70
80
90
100
0 0.2 0.4 0.6 0.8 1.0 1.2
EFFICIEN
C
Y (%)
V
OUT
= 5.0V
V
OUT
= 3.3V
V
OUT
= 2.5V
INDUCTOR: LPS6225-472MLC
DIODE: B230A
09232-072
Figure 2. Efficiency Curve, V
IN
= 12 V, f
SW
= 1.4 MHz
I
OUT
(A)
40
50
60
70
80
90
100
0 0.2 0.4 0.6 0.8 1.0 1.2
EFFICIENCY (%)
V
OUT
= 5.0V
V
OUT
= 3.3V
V
OUT
= 2.5V
V
OUT
= 1.8V
V
OUT
= 1.2V
INDUCTOR: LPS6225-103MLC
DIODE: B230A
0
9232-073
Figure 3. Efficiency Curve, V
IN
= 12 V, f
SW
= 700 kHz
–0.20
–0.15
–0.10
–0.05
0
0.05
0.10
0.15
0.20
5 8 11 14 17 20
LINE REGUL
A
TION (%)
f
SW
= 1.4MHz
f
SW
= 700kHz
V
IN
(V)
0
9232-068
Figure 4. Line Regulation, V
OUT
= 3.3 V, I
OUT
= 500 mA
–0.20
–0.15
–0.10
–0.05
0
0.05
0.10
0.15
0.20
0.20 0.4 0.6 0.8 1.0 1.2
LOAD REGUL
A
TION (%)
f
SW
= 1.4MHz
f
SW
= 700kHz
I
OUT
(A)
0
9232-067
Figure 5. Load Regulation, V
OUT
= 3.3 V, V
IN
= 12 V
CH1 5mV
CH4 500mA Ω
CH2 5V M400ns A CH2 7.4V
2
4
1
B
W
B
W
B
W
V
OUT
IL
SW
09232-024
Figure 6. Steady State at Heavy Load, f
SW
= 1.4 MHz, I
OUT
= 1 A
CH1 20mV
CH4 200mA Ω
CH2 5V M10µs A CH2 8V
2
4
1
B
W
B
W
B
W
V
OUT
IL
SW
0
9232-025
Figure 7. Steady State at Light Load, f
SW
= 1.4 MHz, I
OUT
= 40 mA
UG-179 Evaluation Board User Guide
Rev. 0 | Page 6 of 12
CH1 1V
CH4 500mA Ω
CH2 10V M100µs A CH3 8V
2
4
3
1
CH3 10V
B
W
B
W
B
W
B
W
V
OUT
IL
EN
SW
09232-026
Figure 8. Soft Start with 1 A Resistance Load, f
SW
= 1.4 MHz
2
1
4
V
OUT
I
OUT
SW
CH1 50mV
CH4 500mA Ω
CH2 10V M100µs A CH4 630mA
B
W
B
W
B
W
09232-058
Figure 9. ADP2301 Load Transient, 0.2 A to 1.0 A, V
OUT
= 3.3 V, V
IN
= 12 V
(f
SW
= 1.4 MHz, L = 4.7 μH, C
OUT
= 22 μF)
2
1
4
V
OUT
I
OUT
SW
CH1 100mV
CH4 500mA Ω
CH2 10V M100µs A CH4 630mA
B
W
B
W
B
W
0
9232-060
Figure 10. ADP2300 Load Transient, 0.2 A to 1.0 A, V
OUT
= 3.3 V, V
IN
= 12 V
(f
SW
= 700 kHz, L = 10 μH, C
OUT
= 22 μF)
1
3
V
OUT
V
IN
SW
CH1 5mV
CH3 5V
CH2 10V M1ms A CH3 11.4V
B
W
B
W
2
0
9232-061
Figure 11. ADP2301 Line Transient,
7 V to 15 V, V
OUT
= 3.3 V, I
OUT
= 1.2 A, f
SW
= 1.4 MHz
–100
–80
–60
–40
–20
0
20
40
60
80
100
–200
–160
–120
–80
–40
0
40
80
120
160
200
1k 10k 100k 1M
MAGNITUDE [B/A] (dB)
PHASE [B/A] (Degrees)
CROSS FREQUENCY: 80kHz
PHASE MARGIN: 68°
FREQUENCY (Hz)
09232-063
Figure 12. ADP2301 Bode Plot, V
OUT
= 3.3 V, V
IN
= 12 V
(f
SW
= 1.4 MHz, L = 4.7 μH, C
OUT
= 22 μF)
–100
–80
–60
–40
–20
0
20
40
60
80
100
–200
–160
–120
–80
–40
0
40
80
120
160
200
1k 10k 100k
FREQUENCY (Hz)
1
1M
MAGNITUDE [B/A] (dB)
PHASE [B/A] (Degrees)
CROSS FREQUENCY: 47kHz
PHASE MARGIN: 77°
09232-065
Figure 13. ADP2300 Bode Plot, V
OUT
= 3.3 V, V
IN
= 12 V
(f
SW
= 700 kHz, L = 10 μH, C
OUT
= 22 μF)
P1-P3P4-P6P7-P9P10-P12

ADP2301-EVALZ

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Buy ADP2301-EVALZ
Manufacturer:
Analog Devices / Linear Technology
Description:
Power Management IC Development Tools ADP2301 Eval Brd
Lifecycle:
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