参数资料
型号: DC1663A
厂商: Linear Technology
文件页数: 5/36页
文件大小: 0K
描述: DEMO BOARD LTM4628
软件下载: LTM4628 Spice Model
设计资源: LTM4628 Gerber Files
DC1663A Design Files
标准包装: 1
系列: µModule®
主要目的: DC/DC,步降
输出及类型: 2,非隔离
输出电压: 1.2V,1.5V
电流 - 输出: 8A,8A
输入电压: 4.5 ~ 26.5 V
稳压器拓扑结构: 降压
频率 - 开关: 400kHz
板类型: 完全填充
已供物品:
已用 IC / 零件: LTM4628
LTM4628
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTM4628 is tested under pulsed load conditions such that
T J ≈ T A . The LTM4628E is guaranteed to meet specifications from
0°C to 125°C internal temperature. Specifications over the –40°C to
125°C internal operating temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTM4628I is guaranteed over the full –40°C to 125°C internal operating
temperature range. Note that the maximum ambient temperature
consistent with these specifications is determined by specific operating
conditions in conjunction with board layout, the rated package thermal
impedance and other environmental factors.
Note 3: Two outputs are tested separately and the same testing condition
is applied to each output.
Note 4: The switching frequency is programmable for 400kHz to 750kHz.
Note 5: LTM4628 device is designed to operate from 400kHz to 750kHz
Note 6: 100% tested at wafer level.
Note 7: See output current derating curves for different V IN , V OUT and T A .
TYPICAL PERFORMANCE CHARACTERISTICS
5V IN Efficiency
12V IN Efficiency
24V IN Efficiency
100
FREQ = 500kHz
100
FREQ = 500kHz, 700kHz for 3.3V AND 5V
95
FREQ = 500kHz, 700kHz for 3.3V AND 5V
95
90
85
95
90
85
80
90
85
80
75
80
75
70
65
0
1
2
3
4
5
6
3.3V OUT
2.5V OUT
1.5V OUT
1.2V OUT
0.8V OUT
7
8
75
70
65
60
55
0
1
2
3
4
5
6
5V OUT
3.3V OUT
2.5V OUT
1.5V OUT
1.2V OUT
0.8V OUT
7
8
70
65
60
55
50
0
1
2
3
4
5
6
5V OUT
3.3V OUT
2.5V OUT
1.5V OUT
7
8
100
OUTPUT CURRENT (A)
Burst Mode Pulse-Skipping
Efficiency
4628 G01
OUTPUT CURRENT (A)
0.8V Load Transient
4628 G02
OUTPUT CURRENT (A)
1.2V Load Transient
4628 G03
90
80
70
Burst Mode OPERATION
V OUT
50mV/DIV
V OUT
50mV/DIV
60
50
40
30
I OUT
2A/DIV
I OUT
2A/DIV
100μs/DIV
100μs/DIV
20
10
0
0.001
PULSE-SKIPPING MODE
0.01 0.1 1
OUTPUT CURRENT (A)
10
4628 G05
12V IN , 0.8V OUT , 0A TO 4A LOAD STEP AT 4A/μs
C OUT1 4 × 100μF 6.3V X5R CERAMIC 1210 CASE SIZE
SWITCHING FREQUENCY 400kHz
C FF CAPACITOR = 47pF
4628 G06
12V IN , 1.2V OUT , 0A TO 4A LOAD STEP AT 4A/μs
C OUT1 , 4 × 100μF 6.3V X5R CERAMIC 1210 CASE SIZE
SWITCHING FREQUENCY 500kHz
C FF CAPACITOR = 47pF
4628 G04
4628fe
For more information www.linear.com/LTM4628
5
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