en5311qi-e Enpirion, en5311qi-e Datasheet - Page 6

• Manufacturer Part Number: en5311qi-e
• Description: 1a Synchronous Buck Regulator With Integrated Inductor
• Manufacturer: Enpirion

Typical Performance Characteristics
©Enpirion 2009 all rights reserved, E&OE
03799
I
I
500mA/Div
500mA/Div
V
V
50mV/Div
50mV/Div
Load
Load
out
out
Top to Bottom: V
95
90
85
80
75
70
65
60
55
50
Efficiency Vs. Load Current (Vin = 5.0V)
0
Transient Response
Transient Response
V
V
V
V
I
I
load
load
Output Ripple: V
V
IN
IN
OUT
OUT
0.1
OUT
= 5.0V
= 5.0V
= 100mA to 800mA
= 100mA to 800mA
= 3.3V
= 3.3V
= 1.2V, I
0.2
OUT
0.3
= 3.3 V, 2.5 V, 1.8 V, 1.5 V, 1.2 V, 0.8 V
Load Current (A)
LOAD
0.4
= 1A, C
20μs/Div
20μs/Div
IN
= 5.0 V
0.5
OUT
0.6
= 1 x 10µF 0805
0.7
0.8
0.9
1
11/24/2009
6
Enable
Enable
1V/Div
1V/Div
I
I
500mA/Div
500mA/Div
V
V
1V/Div
1V/Div
V
V
50mV/Div
50mV/Div
Load
Load
out
out
out
out
Top to Bottom: V
100
95
90
85
80
75
70
65
60
55
50
Efficiency Vs. Load Current (Vin = 3.3V)
0
Start up Waveform
Start up Waveform
Transient Response
Transient Response
V
V
V
V
V
V
V
V
I
I
load
load
Output Ripple: V
V
IN
IN
OUT
OUT
IN
IN
OUT
OUT
0.1
OUT
= 5.0V
= 5.0V
= 3.3V
= 3.3V
= 100mA to 800mA
= 100mA to 800mA
= 3.3V
= 3.3V
= 1.8V
= 1.8V
= 1.2V, I
0.2
OUT
0.3
= 2.5 V, 1.8 V, 1.5 V, 1.2 V, 0.8 V
Load Current (A)
LOAD
0.4
= 1A, C
400μs/Div
400μs/Div
20μs/Div
20μs/Div
IN
= 3.3 V
0.5
OUT
0.6
= 1 x 10µF 0805
0.7
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0.8
0.9
1
EN5311QI
Rev:B