参数资料
型号: LTC3708EUH#TR
厂商: Linear Technology
文件页数: 4/32页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 32-QFN
标准包装: 2,500
系列: PolyPhase®
PWM 型: 电流模式
输出数: 2
占空比: 90%
电源电压: 4 V ~ 36 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 32-WFQFN 裸露焊盘
包装: 带卷 (TR)
LTC3708
ELECTRICAL CHARACTERISTICS The l denotes the speci?cations which apply over the full operating
temperature range, otherwise speci?cations are at T A = 25°C. V CC = 5V, DRV CC = 5V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
I INTLPF
Internal Phase Detector Output Current
t ON(PLL)1
Sourcing Capability
Sinking Capability
t ON1 Modulation Range by External PLL
f SW1 < f SW2 , V INTLPF = 0V
f SW1 > f SW2 , V INTLPF = 2.4
20
–20
μA
μA
Up Modulation
I ON1 = 60μA, V EXTLPF = 1.8V
186
233
ns
Down Modulation
I ON1 = 60μA, V EXTLPF = 0.6V
58
80
ns
t ON(PLL)2
t ON2 Modulation Range by Internal PLL
Up Modulation
I ON1 = 60μA, V EXTLPF = 1.8V
186
233
ns
Down Modulation
I ON1 = 60μA, V EXTLPF = 0.6V
58
80
ns
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
reliabilty and lifetime.
Note 2: T J is calculated from the ambient temperature T A and power
dissipation P D as follows:
T J = T A + (P D ? 34°C/W)
Note 3: The LTC3708 is tested in a feedback loop that adjusts V FB to
Note 4: Internal reference voltage is tested indirectly by extracting error
ampli?er offset from the feedback voltage.
Note 5: The LTC3708E is guaranteed to meet performance speci?cations
from 0°C to 85°C. Speci?cations over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 6: R DS(ON) limit is guaranteed by design and/or correlation to static
test.
achieve a speci?ed error ampli?er output voltage (I TH ).
TYPICAL PERFORMANCE CHARACTERISTICS
I OUT1
10A/DIV
V OUT1
100mV/DIV
V OUT2
100mV/DIV
Load Transient on Channel 1
I OUT2
10A/DIV
V OUT1
100mV/DIV
V OUT2
100mV/DIV
Load Transient on Channel 2
V OUT1
0.5V/DIV
20μs/DIV
Coincident Tracking
3708 G01
V OUT1
0.5V/DIV
20μs/DIV
Ratiometric Tracking
3708 G02
V OUT2
0.5V/DIV
V OUT2
0.5V/DIV
2ms/DIV
3708 G03
2ms/DIV
3708 G04
3708fb
4
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