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RT8075ZQW

P1-P3P4-P6P7-P9P10-P11
RT8075
4
DS8075-04 April 2011www.richtek.com
Note 1. Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device. These are for
stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may remain possibility to affect device reliability.
Note 2. θ
JA
is measured in the natural convection at T
A
= 25°C on a high effective thermal conductivity four-layer test board of
JEDEC 51-7 thermal measurement standard. The case point of θ
JC
is on the exposed pad of the package.
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
Note 5. Guarantee by design.
RT8075
5
DS8075-04 April 2011 www.richtek.com
Reference Voltage vs. Temperature
0.580
0.585
0.590
0.595
0.600
0.605
0.610
0.615
0.620
-50 -25 0 25 50 75 100 125
Temperature (°C)
Reference Voltage (V)
Reference Voltage vs. Input Voltage
0.580
0.585
0.590
0.595
0.600
0.605
0.610
0.615
0.620
2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
Reference Voltage (V)
Efficiency vs. Output Current
0
10
20
30
40
50
60
70
80
90
100
0.001 0.01 0.1 1
Output Current (A)
Efficiency (%)
Output Voltage vs. Output Current
1.180
1.185
1.190
1.195
1.200
1.205
1.210
1.215
1.220
1.225
1.230
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Output Current (A)
Output Voltage (V)
Typical Operating Characteristics
V
IN
= 2.5V
V
IN
= 3.3V
V
IN
= 5.5V
V
OUT
= 1.2V
V
IN
= 3.3V
V
OUT
= 1.2V, I
OUT
= 0.1A
V
IN
= 2.5V, V
OUT
= 1.2V, I
OUT
= 0.1A
Frequency vs. Temperature
1.00
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
1.45
1.50
-50 -25 0 25 50 75 100 125
Temperature (°C)
Frequency (MHz) 1
V
IN
= 3.3V, V
OUT
= 1.2V
Current Limit vs. Temperature
0.5
0.7
0.9
1.1
1.3
1.5
1.7
1.9
2.1
-50-250 255075100125
Temperature (°C)
Current Limit (A)
V
IN
= 3.3V, V
OUT
= 1.2V
RT8075
6
DS8075-04 April 2011www.richtek.com
Power On from V
IN
Time (5ms/Div)
V
OUT
(1V/Div)
V
IN
(1V/Div)
I
OUT
(1A/Div)
V
IN
= 2.5V, V
OUT
= 1.2V
I
OUT
= 0.8A
Power On from EN
Time (250μs/Div)
V
OUT
(1V/Div)
V
EN
(1V/Div)
I
OUT
(1A/Div)
V
IN
= 2.5V,
V
OUT
= 1.2V,
I
OUT
= 0.8A
Power Off from EN
Time (50μs/Div)
V
OUT
(1V/Div)
V
EN
(1V/Div)
I
OUT
(1A/Div)
V
IN
= 2.5V,
V
OUT
= 1.2V,
I
OUT
= 0.8A
Switching
Time (250ns/Div)
V
OUT
(5mV/Div)
V
LX
(2V/Div)
I
OUT
(1A/Div)
V
IN
= 2.5V, V
OUT
= 1.2V, I
OUT
= 0.8A
Load Transient Response
Time (100μs/Div)
V
OUT
(50mV/Div)
I
OUT
(1A/Div)
V
IN
= 2.5V, V
OUT
= 1.2V, I
OUT
= 0.4A to 0.8A
Load Transient Response
Time (100μs/Div)
V
OUT
(50mV/Div)
I
OUT
(1A/Div)
V
IN
= 2.5V, V
OUT
= 1.2V, I
OUT
= 0.1A to 0.8A
P1-P3P4-P6P7-P9P10-P11

RT8075ZQW

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