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RT7277GSP

P1-P3P4-P6P7-P9P10-P12P13-P14
RT7277
7
DS7277-01 March 2013 www.richtek.com
©
Copyright 2013 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Typical Operating Characteristics
Efficiency vs. Output Current
0
10
20
30
40
50
60
70
80
90
100
0.001 0.01 0.1 1 10
Output Current (A)
Efficiency (%)
V
IN
= 5V
V
IN
= 12V
V
IN
= 17V
V
OUT
= 1.05V
Output Voltage vs. Temperature
1.025
1.030
1.035
1.040
1.045
1.050
1.055
1.060
1.065
-50 -25 0 25 50 75 100 125
Temperature (°C)
Output Voltage (V)
V
IN
= 12V, V
OUT
= 1.05V, I
OUT
= 0A
Frequency vs. Input Voltage
650
660
670
680
690
700
710
720
730
740
750
4681012141618
Input Voltage (V)
Frequency (kHz) 1
Reference Voltage vs. Temperature
0.745
0.750
0.755
0.760
0.765
0.770
0.775
0.780
0.785
-50 -25 0 25 50 75 100 125
Temperature (°C)
Reference Voltage (V)
Output Voltage vs. Input Voltage
1.025
1.030
1.035
1.040
1.045
1.050
1.055
1.060
1.065
4 6 8 1012141618
Input Voltage (V)
Output Voltage (V)
V
OUT
= 1.05V
Output Voltage vs. Output Current
1.025
1.030
1.035
1.040
1.045
1.050
1.055
1.060
1.065
00.511.522.53
Output Current (A)
Output Voltage (V)
V
OUT
= 1.05V
V
IN
= 17V
V
IN
= 12V
V
IN
= 5V
RT7277
8
DS7277-01 March 2013www.richtek.com
©
Copyright 2013 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Time (100μs/Div)
Load Transient Response
V
OUT
(20mV/Div)
I
OUT
(2A/Div)
V
IN
= 12V, V
OUT
= 1.05V, I
OUT
= 0A to 3A
Time (5ms/Div)
Power On from VIN
V
IN
= 12V, V
OUT
= 1.05V, I
OUT
= 3A
V
OUT
(1V/Div)
V
IN
(5V/Div)
I
OUT
(2A/Div)
Time (10ms/Div)
Power Off from VIN
V
IN
= 12V, V
OUT
= 1.05V, I
OUT
= 3A
V
OUT
(1V/Div)
V
IN
(5V/Div)
I
OUT
(2A/Div)
Current Limit vs. Input Voltage
3.0
3.5
4.0
4.5
5.0
5.5
6.0
4681012141618
Input Voltage (V)
Current Limit (A)
V
IN
= 12V, V
OUT
= 1.05V
Current Limit vs. Temperature
4.0
4.4
4.8
5.2
5.6
6.0
-50-250 255075100125
Temperature (°C)
Current Limit (A)
V
IN
= 12V, V
OUT
= 1.05V
Time (1μs/Div)
Switching
V
IN
= 12V, V
OUT
= 1.05V, I
OUT
= 3A
V
SW
(10V/Div)
I
L
(2A/Div)
V
OUT
(10mV/Div)
RT7277
9
DS7277-01 March 2013 www.richtek.com
©
Copyright 2013 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Time (1ms/Div)
Power On from EN
V
IN
= 12V, V
OUT
= 1.05V, I
OUT
= 3A
V
OUT
(1V/Div)
V
EN
(2V/Div)
I
OUT
(2A/Div)
Time (10μs/Div)
Power Off from EN
V
IN
= 12V, V
OUT
= 1.05V, I
OUT
= 3A
V
OUT
(1V/Div)
V
EN
(2V/Div)
I
OUT
(2A/Div)
EN Current vs. EN Voltage
0
1
2
3
4
5
6
7
8
9
10
0 2 4 6 8 10 12 14 16 18
EN Voltage (V)
EN Current (μA)
V
IN
= 17V
P1-P3P4-P6P7-P9P10-P12P13-P14

RT7277GSP

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