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RT8056GQW

P1-P3P4-P6P7-P9P10-P11
RT8056
4
DS8056-02 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 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 measurement case position 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. Guaranteed by Design.
RT8056
5
DS8056-02 April 2011 www.richtek.com
Typical Operating Characteristics
Frequency vs. Temperature
1.10
1.20
1.30
1.40
1.50
1.60
1.70
-50 -25 0 25 50 75 100 125
Temperature (°C)
Frequency (MHz) 1
V
IN
= 5V, V
OUT
= 1.2V, I
OUT
= 0.3A
Output Voltage vs. Output Current
2.51
2.52
2.53
2.54
2.55
2.56
2.57
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)
V
IN
= 5.5V
V
IN
= 5V
V
IN
= 3.3V
V
OUT
= 2.5V
Output Voltage vs. Output Current
1.180
1.185
1.190
1.195
1.200
1.205
1.210
1.215
1.220
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Output Current (A)
Output Voltage (V)
V
IN
= 5.5V
V
IN
= 5V
V
IN
= 3.3V
V
OUT
= 1.2V
Efficiency vs. Output Current
0
10
20
30
40
50
60
70
80
90
100
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Output Current (A)
Efficincy (%)
V
IN
= 3.3V
V
IN
= 5V
V
IN
= 5.5V
V
OUT
= 1.2V
Efficiency vs. Output Current
0
10
20
30
40
50
60
70
80
90
100
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Output Current (A)
Efficincy (%)
V
IN
= 3.3V
V
IN
= 5V
V
IN
= 5.5V
V
OUT
= 2.5V
Current Limit vs. Input Voltage
0.00
0.35
0.70
1.05
1.40
1.75
2.10
2.8 3.1 3.4 3.7 4.0 4.3 4.6 4.9 5.2 5.5
Input Voltage (V)
Peak Current Limit (A
)
V
IN
= 2.8V to 5.5V
V
OUT
= 2.5V
V
OUT
= 1.2V
RT8056
6
DS8056-02 April 2011www.richtek.com
Output Voltage vs. Temperature
1.16
1.17
1.18
1.19
1.20
1.21
1.22
-50 -25 0 25 50 75 100 125
Temperature (°C)
Output Voltage (V)
V
IN
= 5V, V
OUT
= 1.2V, I
OUT
= 0.3A
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)
V
IN
= 5V, I
OUT
= 0.3A
Current Limit vs. Temperature
0.00
0.35
0.70
1.05
1.40
1.75
2.10
-50 -25 0 25 50 75 100 125
Temperature (°C)
Output Current Limit (A
)
V
OUT
= 2.5V
V
OUT
= 1.2V
V
IN
= 5V
Output Voltage vs. Input Voltage
1.100
1.125
1.150
1.175
1.200
1.225
1.250
1.275
1.300
2.8 3.1 3.4 3.7 4.0 4.3 4.6 4.9 5.2 5.5
Input Voltage (V)
Output Voltage (V)
V
IN
= 2.8V to 5.5V, V
OUT
= 1.2V
I
OUT
= 0.1A
I
OUT
= 1A
Output Ripple
Time (250ns/Div)
V
OUT1
(5mV/Div)
V
LX1
(5V/Div)
V
IN
= 5V, V
OUT
= 1.2V, I
OUT
= 1A
Output Ripple
Time (250ns/Div)
V
IN
= 5V, V
OUT
= 2.5V, I
OUT
= 1A
V
OUT2
(5mV/Div)
V
LX2
(5V/Div)
P1-P3P4-P6P7-P9P10-P11

RT8056GQW

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