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参数资料
| 型号： | LTC3569IUDC#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 4/26页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ TRPL 20QFN |
| 标准包装： | 91 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 3 |
| 输出电压： | 0.43 V ~ 5.5 V |
| 输入电压： | 2.5 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 2.25MHz，1MHz ~ 3MHz |
| 电流 - 输出： | 600mA，1.2A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WFQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 20-QFN（3x4） |
LTC3569
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T A = 25°C. V IN = 3.6V unless otherwise noted (Notes 2, 7).
SYMBOL
R PGOOD
UVLO
PARAMETER
PGOOD Pull-Down On-Resistance
Undervoltage Lockout
CONDITIONS
V FBX < 0.4V
l
MIN
TYP
380
MAX
525
2.5
UNITS
Ω
V
f OSC
Fixed Oscillator Frequency
V RT = SV IN
l
1.9
2.25
2.8
MHz
f CLK(MAX)
Maximum Programmable Oscillator Frequency R T = 100k
l
3.0
MHz
f CLK(MIN)
f SYNC
Minimum Programmable Oscillator Frequency
Sync Frequency
R T = 453k
V RT = SV IN
l
1.0
3
MHz
MHz
R T = 453k
1.2
MHz
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: Current into a pin is positive and current out of a pin is negative.
All voltages referenced to SGND.
Note 3: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 4: Specification is guaranteed by design and not 100% tested in
production.
Note 5: Switch on-resistance verified by correlation to wafer level
measurements.
Note 6: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature exceeds 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 7: The LTC3569 is tested under pulsed load conditions such that
T J ≈ T A . The LTC3569E is guaranteed to meet specified performance from
0°C to 85°C. Specifications over the –40°C to 125°C operating junction
temperature range are assured by design characterization and correlation
with statistical process controls. The LTC3569I is guaranteed to meet
specified performance over the full –40°C to 125°C operating junction
temperature range.
TYPICAL PERFORMANCE CHARACTERISTICS
T A = 25°C, unless otherwise noted.
300
250
200
I SVIN vs Temperature
BUCK1 ONLY PULSE-SKIPPING V IN = 3.5V
SLOPE ? 185nA/°C
100
90
80
70
60
Efficiency vs Load Current
OUT2 = 1.8V
V IN = 3V
V IN = 5V
100
90
80
70
60
Efficiency vs Load Current
OUT3 = 1.2V
V IN = 3V
V IN = 5V
150
50
50
100
50
BUCK1 ONLY Burst Mode OPERATION
V IN = 3.5V
40
30
20
40
30
20
SLOPE ? 132nA/°C
0
–50 0
50
NO LOAD
100 150
10
0
0.01
0.1
Burst Mode OPERATION
PULSE-SKIPPING
1 10 100 1000
10
0
0.01
0.1
Burst Mode OPERATION
PULSE-SKIPPING
1 10 100 1000
TEMPERATURE (°C)
3569 G01
I LOAD (mA)
3569 G02
I LOAD (mA)
3569 G03
3569fd
4
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相关代理商/技术参数 |
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|---|---|
| LTC3569IUD-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Triple Buck Regulator With 1.2A and Two 600mA Outputs and Individual Programmable References |
| LTC3569IUD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Triple Buck Regulator With 1.2A and Two 600mA Outputs and Individual Programmable References |
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