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PDF LTM4602 Data sheet ( Hoja de datos )
| Número de pieza | LTM4602 | |
| Descripción | DC/DC step down power supply | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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FEATURES
■ Complete Switch Mode Power Supply
■ Wide Input Voltage Range: 4.5V to 20V
■ 6A DC, 8A Peak Output Current
■ 0.6V to 5V Output Voltage
■ 1.5% Output Voltage Regulation
■ Ultrafast Transient Response
■ Current Mode Control
■ Pb-Free (e4) RoHS Compliant Package with Gold-
Pad Finish
■ Pin Compatible with the LTM4600
■ Up to 92% Efficiency
■ Programmable Soft-Start
■ Output Overvoltage Protection
■ Optional Short-Circuit Shutdown Timer
■ See the LTM4602HV for Operation Up to 28VIN
■ Small Footprint, Low Profile (15mm × 15mm ×
2.8mm) Surface Mount LGA Package
U
APPLICATIO S
■ Telecom and Networking Equipment
■ Servers
■ Industrial Equipment
■ Point of Load Regulation
LTM4602
6A High Efficiency
DC/DC µModule
DESCRIPTIO
The LTM®4602 is a complete 6A DC/DC step down power
supply. Included in the package are the switching control-
ler, power FETs, inductor, and all support components.
Operating over an input voltage range of 4.5V to 20V, the
LTM4602 supports an output voltage range of 0.6V to 5V,
set by a single resistor. This high efficiency design delivers
6A continuous current (8A peak), needing no heat sinks or
airflow to meet power specifications. Only bulk input and
output capacitors are needed to finish the design.
The low profile package (2.8mm) enables utilization of
unused space on the bottom of PC boards for high density
point of load regulation. High switching frequency and an
adaptive on-time current mode architecture enables a very
fast transient response to line and load changes without
sacrificing stability. Fault protection features include
integrated overvoltage and short circuit protection with
a defeatable shutdown timer. A built-in soft-start timer is
adjustable with a small capacitor.
The LTM4602 is packaged in a thermally enhanced, compact
(15mm × 15mm) and low profile (2.8mm) over-molded
Land Grid Array (LGA) package suitable for automated as-
sembly by standard surface mount equipment. For the 4.5V
to 28V input range version, refer to the LTM4602HV.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
µModule is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners. Protected by U.S. Patents including 5481178,
6100678, 6580258, 5847554, 6304066.
TYPICAL APPLICATIO
6A µModuleTM Power Supply with 4.5V to 20V Input
VIN
4.5V TO 20V
VIN VOUT
CIN
LTM4602
COUT
VOUT
1.5V
6A
VOSET
PGND SGND
RSET
66.5k
4602 TA01a
100
90
80
70
60
50
40
30
20
10
0
0
Efficiency vs Load Current
with 12VIN (FCB = 0)
0.8VOUT
1.2VOUT
1.5VOUT
1.8VOUT
2.5VOUT
3.3VOUT
3.3VOUT (950kHz)*
*950kHz INSTEAD OF 1.3MHz
INCREASES 3.3V EFFICIENCY 2%
246
LOAD CURRENT (A)
8
4602 G01
4602f
1
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LTM4602
TYPICAL PERFOR A CE CHARACTERISTICS (See Figure 21 for all curves)
Start-Up, No Load, IOUT = 0A
Start-Up, IOUT = 6A
(Resistive Load)
Short-Circuit Protection,
IOUT = 0A
VOUT
0.5V/DIV
VOUT
0.5V/DIV
VOUT
0.5V/DIV
IIN
0.5A/DIV
VIN = 12V
200µs/DIV
VOUT = 1.5V
COUT = 1 × 22µF, 6.3V X5R
330µF, 4V SANYO POS CAP
4602 G10
NO EXTERNAL SOFT-START CAPACITOR
IIN
0.5A/DIV
VIN = 12V
500µs/DIV
VOUT = 1.5V
COUT = 1 × 22µF, 6.3V X5R
330µF, 4V SANYO POS CAP
4602 G11
NO EXTERNAL SOFT-START CAPACITOR
IIN
0.5A/DIV
VIN = 12V
20µs/DIV
VOUT = 1.5V
COUT = 1 × 22µF, 6.3V X5R
330µF, 4V SANYO POS CAP
4602 G12
NO EXTERNAL SOFT-START CAPACITOR
Short-Circuit Protection,
IOUT = 6A
VOUT
0.5V/DIV
IIN
0.5A/DIV
VIN = 12V
20µs/DIV
4602 G13
VOUT = 1.5V
COUT = 1 × 22µF, 6.3V X5R
330µF, 4V SANYO POS CAP
NO EXTERNAL SOFT-START CAPACITOR
VIN to VOUT Stepdown Ratio
5.5
fADJ = OPEN
5.0
5V
4.5
4.0
3.5 3.3V
3.0
2.5V
2.5
2.0 1.8V
1.5 1.5V
1.0 1.2V
0.5
0
0
0.6V
5 10 15 20 25 28
VIN (V)
SEE FREQUENCY ADJUSTMENT DISCUSSION
FOR 12VIN TO 5VOUT AND 5VIN TO 3.3VOUT
CONVERSION
4602 G14
4602f
5
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LTM4602
APPLICATIO S I FOR ATIO
Table 2. Output Voltage Response Versus Component Matrix (Refer to Figure 20), 0A to 3A Step (Typical Values)
TYPICAL MEASURED VALUES
COUT1 VENDORS
TDK
PART NUMBER
C4532X5R0J107MZ (100UF,6.3V)
COUT2 VENDORS
SANYO POS CAP
PART NUMBER
6TPE330MIL (330µF, 6.3V)
TAIYO YUDEN
JMK432BJ107MU-T ( 100µF, 6.3V)
SANYO POS CAP
2R5TPE470M9 (470µF, 2.5V)
TAIYO YUDEN
JMK316BJ226ML-T501 ( 22µF, 6.3V)
SANYO POS CAP
4TPE470MCL (470µF, 4V)
VOUT
CIN
(V) (CERAMIC)
CIN
(BULK)
COUT1
(CERAMIC)
COUT2
(BULK)
CCOMP C3 VIN DROOP PEAK TO PEAK RECOVERY TIME LOAD STEP
(V) (mV)
(mV)
(µs) (A/µs)
1.2 2 × 10µF 25V 150µF 35V 3 × 22µF 6.3V 470µF 4V NONE 100pF 5
50
60
25 3
1.2 2 × 10µF 25V 150µF 35V 1 × 100µF 6.3V 470µF 2.5V NONE 100pF 5
30
60
20 3
1.2 2 × 10µF 25V 150µF 35V 2 × 100µF 6.3V 330µF 6.3V NONE 100pF 5
25
54
20 3
1.2 2 × 10µF 25V 150µF 35V 4 × 100µF 6.3V
NONE
NONE 100pF 5
25
55
20 3
1.2 2 × 10µF 25V 150µF 35V 3 × 22µF 6.3V 470µF 4V NONE 100pF 12
30
60
25 3
1.2 2 × 10µF 25V 150µF 35V 1 × 100µF 6.3V 470µF 2.5V NONE 100pF 12
25
54
20 3
1.2 2 × 10µF 25V 150µF 35V 2 × 100µF 6.3V 330µF 6.3V NONE 100pF 12
25
50
20 3
1.2 2 × 10µF 25V 150µF 35V 4 × 100µF 6.3V
NONE
NONE 100pF 12
25
55
20 3
1.5 2 × 10µF 25V 150µF 35V 3 × 22µF 6.3V 470µF 4V NONE 100pF 5
25
50
25 3
1.5 2 × 10µF 25V 150µF 35V 1 × 100µF 6.3V 470µF 2.5V NONE 100pF 5
25
54
20 3
1.5 2 × 10µF 25V 150µF 35V 2 × 100µF 6.3V 330µF 6.3V NONE 100pF 5
28
59
20 3
1.5 2 × 10µF 25V 150µF 35V 4 × 100µF 6.3V
NONE
NONE 100pF 5
26
59
20 3
1.5 2 × 10µF 25V 150µF 35V 3 × 22µF 6.3V 470µF 4V NONE 100pF 12
25
55
25 3
1.5 2 × 10µF 25V 150µF 35V 1 × 100µF 6.3V 470µF 2.5V NONE 100pF 12
25
54
20 3
1.5 2 × 10µF 25V 150µF 35V 2 × 100µF 6.3V 330µF 6.3V NONE 100pF 12
28
59
20 3
1.5 2 × 10µF 25V 150µF 35V 4 × 100µF 6.3V
NONE
NONE 100pF 12
26
59
20 3
1.8 2 × 10µF 25V 150µF 35V 3 × 22µF 6.3V 470µF 4V NONE 100pF 5
25
54
30 3
1.8 2 × 10µF 25V 150µF 35V 1 × 100µF 6.3V 470µF 2.5V NONE 100pF 5
25
50
20 3
1.8 2 × 10µF 25V 150µF 35V 2 × 100µF 6.3V 330µF 6.3V NONE 100pF 5
25
50
20 3
1.8 2 × 10µF 25V 150µF 35V 4 × 100µF 6.3V
NONE
NONE 100pF 5
29
60
20 3
1.8 2 × 10µF 25V 150µF 35V 3 × 22µF 6.3V 470µF 4V NONE 100pF 12
25
50
30 3
1.8 2 × 10µF 25V 150µF 35V 1 × 100µF 6.3V 470µF 2.5V NONE 100pF 12
25
50
20 3
1.8 2 × 10µF 25V 150µF 35V 2 × 100µF 6.3V 330µF 6.3V NONE 100pF 12
25
50
20 3
1.8 2 × 10µF 25V 150µF 35V 4 × 100µF 6.3V
NONE
NONE 100pF 12
29
60
20 3
2.5 2 × 10µF 25V 150µF 35V 1 × 100µF 6.3V 470µF 4V NONE 220pF 5
25
50
30 3
2.5 2 × 10µF 25V 150µF 35V 2 × 100µF 6.3V 330µF 6.3V NONE 220pF 5
25
50
30 3
2.5 2 × 10µF 25V 150µF 35V 3 × 22µF 6.3V 470µF 4V NONE 220pF 5
25
50
30 3
2.5 2 × 10µF 25V 150µF 35V 4 × 100µF 6.3V
NONE
NONE 220pF 5
25
50
25 3
2.5 2 × 10µF 25V 150µF 35V 1 × 100µF 6.3V 470µF 4V NONE 220pF 12
25
50
30 3
2.5 2 × 10µF 25V 150µF 35V 3 × 22µF 6.3V 470µF 4V NONE 220pF 12
25
50
30 3
2.5 2 × 10µF 25V 150µF 35V 2 × 100µF 6.3V 330µF 6.3V NONE 220pF 12
25
50
30 3
2.5 2 × 10µF 25V 150µF 35V 4 × 100µF 6.3V
NONE
NONE 220pF 12
27
54
25 3
3.3 2 × 10µF 25V 150µF 35V 2 × 100µF 6.3V 330µF 6.3V NONE 220pF 7
32
64
30 3
3.3 2 × 10µF 25V 150µF 35V 1 × 100µF 6.3V 470µF 4V NONE 220pF 7
30
60
30 3
3.3 2 × 10µF 25V 150µF 35V 3 × 22µF 6.3V 470µF 4V NONE 220pF 7
30
60
35 3
3.3 2 × 10µF 25V 150µF 35V 4 × 100µF 6.3V
NONE
NONE 220pF 7
32
64
25 3
3.3 2 × 10µF 25V 150µF 35V 1 × 100µF 6.3V 470µF 4V NONE 220pF 12
38
58
30 3
3.3 2 × 10µF 25V 150µF 35V 3 × 22µF 6.3V 470µF 4V NONE 220pF 12
30
60
35 3
3.3 2 × 10µF 25V 150µF 35V 2 × 100µF 6.3V 330µF 6.3V NONE 220pF 12
30
60
30 3
3.3 2 × 10µF 25V 150µF 35V 4 × 100µF 6.3V
NONE
NONE 220pF 12
32
64
25 3
5 2 × 10µF 25V 150µF 35V 1 × 100µF 6.3V
NONE
NONE 100pF 15
80
160
25 3
5 2 × 10µF 25V 150µF 35V 1 × 100µF 6.3V
NONE
NONE 100pF 20
80
160
25 3
4602f
11
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet LTM4602.PDF ] | |
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