RT8058A
4
DS8058A-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 the natural convection at T
A
= 25°C on a high effective four layers thermal conductivity 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.
RT8058A
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DS8058A-02 April 2011 www.richtek.com
Typical Operating Characteristics
Switching Frequency vs. Temperature
1.00
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
-50 -25 0 25 50 75 100 125
Temperature
Switching Frequency (MHz)
(°C)
V
IN
= 3.3V, V
OUT
= 1.2V, I
OUT
= 300mA
Switching Frequency vs. Input Voltage
1.00
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
Switching Frequency (MHz)
V
OUT
= 1.2V, I
OUT
= 300mA
FB Voltage vs. Temperature
0.580
0.582
0.584
0.586
0.588
0.590
0.592
0.594
0.596
0.598
0.600
-50 -25 0 25 50 75 100 125
Temperature
FB Voltage (V)
V
IN
= 3.3V, I
OUT
= 0A
(°C)
Output Voltage vs. Input Voltage
1.190
1.191
1.192
1.193
1.194
1.195
1.196
1.197
1.198
1.199
1.200
2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
Output Voltage (V)
I
OUT
= 0A
Efficiency vs. Output Current
0
10
20
30
40
50
60
70
80
90
100
0 0.25 0.5 0.75 1 1.25 1.5 1.75 2
Output Current (A)
Efficiency (%)
V
IN
= 3.3V
V
IN
= 5V
V
OUT
= 1.2V, L = 3.3μH, C
OUT
= 22μF
Output Voltage vs. Output Current
1.188
1.189
1.190
1.191
1.192
1.193
1.194
1.195
1.196
0 0.25 0.5 0.75 1 1.25 1.5 1.75 2
Output Current (A)
Output Voltage (V)
V
IN
= 3.3V
V
IN
= 5V
V
OUT
= 1.2V, L = 3.3μH, C
OUT
= 22μF
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6
DS8058A-02 April 2011www.richtek.com
Output Current vs. Temperature
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
-50 -25 0 25 50 75 100 125
Temperature
Output Current (A)
V
IN
= 3.3V, V
OUT
= 1.2V
(°C)
Output Current vs. Input Voltage
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
2.533.544.555.5
Input Voltage (V)
Output Current (A)
V
OUT
= 1.2V
EN Voltage vs. Input Voltage
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
EN Voltage (V)
V
OUT
= 1.2V, I
OUT
= 0A
Rising
Falling
EN Voltage vs. Temperature
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
-50 -25 0 25 50 75 100 125
Temperature
EN Voltage (V)
(°C)
V
IN
= 3.3V, V
OUT
= 1.2V, I
OUT
= 0A
Rising
Falling
V
IN
= 3.3V, V
OUT
= 1.2V, I
OUT
= 10mA to 1A
Load Transient Response
Time (50μs/Div)
I
OUT
(1A/Div)
V
OUT
(50mV/Div)
V
IN
= 3.3V, V
OUT
= 1.2V, I
OUT
= 10mA to 2A
Load Transient Response
Time (50μs/Div)
I
OUT
(1A/Div)
V
OUT
(50mV/Div)

RT8058AGQW

Mfr. #:
Manufacturer:
Description:
IC REG BUCK ADJUSTABLE 2A 10WDFN
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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