LTM4611(RevB) Ver la hoja de datos (PDF) - Linear Technology
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LTM4611 Datasheet PDF : 30 Pages
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LTM4611
Typical Performance Characteristics
Pulse-Skipping Mode Efficiency
95
1V Transient Response, 3.3VIN
1V Transient Response, 5VIN
90
85
80
75
3.3VIN TO 1.5VOUT
VOUT
50mV/DIV
AC-COUPLED
70
5VIN TO 1VOUT
65
60
ILOAD
5A/DIV
55
VOUT
50mV/DIV
AC-COUPLED
ILOAD
5A/DIV
50
20µs/DIV
4611 G08
20µs/DIV
4611 G09
45
VIN = 3.3V, VOUT = 1V, USING DIFF AMP
VIN = 5V, VOUT = 1V, USING DIFF AMP
40
4 × 100µF CERAMIC OUTPUT CAPACITORS
4 × 100µF CERAMIC OUTPUT CAPACITORS
35
CFF = 47pF, CP = NONE
7.5A LOAD STEP AT 7.5A/µs
CFF = 47pF, CP = NONE
7.5A LOAD STEP AT 7.5A/µs
30
0.1
1
10
OUTPUT CURRENT (A)
4611 G07
3.3V Transient Response, 5VIN
Start-Up, No Load
Start-Up, 15A Load
VOUT
50mV/DIV
AC-COUPLED
VIN
1V/DIV
ILOAD
5A/DIV
20µs/DIV
4611 G10
VIN = 5V, VOUT = 3.3V, USING DIFF AMP
2 × 100µF CERAMIC OUTPUT CAPACITORS
CFF = 10pF, CP = NONE
7.5A LOAD STEP AT 7.5A/µs
VOUT
500mV/DIV
IIN
1A/DIV
1ms/DIV
4611 G11
VIN = 3.3V, VOUT = 1.5V, NO LOAD
3 × 22µF CERAMIC INPUT CAPACITORS
CSS = 10nF
4 × 100µF CERAMIC OUTPUT CAPACITORS
CFF = 33pF, CP = 10pF
VIN
1V/DIV
VOUT
500mV/DIV
ILOAD
5A/DIV
IIN
5A/DIV
1ms/DIV
4611 G12
VIN = 3.3V, VOUT = 1.5V, 100mΩ LOAD
3 × 22µF CERAMIC INPUT CAPACITORS
CSS = 10nF
4 × 100µF CERAMIC OUTPUT CAPACITORS
CFF = 33pF, CP = 10pF
Start-Up, Pre-Bias
Short-Circuit, 15A
VOUT
500mV/DIV
VOUT
500mV/DIV
ILOAD
2mA/DIV
IIN
1A/DIV
RUN
5V/DIV
IIN
2A/DIV
2ms/DIV
4611 G13
VIN = 3.3V, VOUT = 1.5V, 0.75V PRE-BIAS LOAD
3 × 22µF CERAMIC INPUT CAPACITORS
CSS = 10nF
4 × 100µF CERAMIC OUTPUT CAPACITORS
CFF = 33pF, CP = 10pF
20µs/DIV
VIN = 3.3V, VOUT = 1.5V
15A LOAD PRIOR TO SHORT
Short-Circuit, No Load
VOUT
500mV/DIV
4611 G14
IIN
1A/DIV
20µs/DIV
VIN = 3.3V, VOUT = 1.5V
NO LOAD PRIOR TO SHORT
4611 G15
4611fb
6
For more information www.linear.com/LTM4611
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