参数资料
型号: LTC3112EFE#PBF
厂商: Linear Technology
文件页数: 3/32页
文件大小: 0K
描述: IC REG BUCK BOOST SYNC 20-TSSOP
标准包装: 74
类型: 降压(降压),升压(升压)
输出类型: 可调式
输出数: 1
输出电压: 2.5 V ~ 14 V
输入电压: 2.7 V ~ 15 V
PWM 型: 电压模式,混合
频率 - 开关: 750kHz
电流 - 输出: 2.5A
同步整流器:
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 20-TSSOP(0.173",4.40mm 宽)裸露焊盘
包装: 管件
供应商设备封装: 20-TSSOP-EP
LTC3112
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating junction
temperature range, otherwise specifications are at T A = 25°C (Note 2). V IN = V OUT = PWM/SYNC = RUN = 5V unless otherwise noted.
PARAMETER
Input Operating Range
V IN UVLO Threshold
CONDITIONS
0°C to 125°C
–40°C to 0°C
Rising
MIN
2.7
2.85
2.0
TYP
2.3
MAX
15
15
2.7
UNITS
V
V
V
V IN UVLO Hysteresis
300
mV
V CC UVLO Threshold
Rising
l
2.2
2.35
2.5
V
V CC UVLO Hysteresis
150
mV
Output Voltage Adjust Range
l
2.5
14
V
INTV CC Clamp Voltage
V IN = 5V or 15V
l
3.8
4.2
4.6
V
V CC Voltage in Dropout
V IN = 2.7V, I VCC = 10mA
2.6
V
Quiescent Current – Burst Mode Operation
Quiescent Current – Shutdown
V FB = 1V, V PWM/SYNC = 0V
RUN = V OUT = V CC = 0V, Not Including Switch Leakage
50
0
75
1
μA
μA
Feedback Voltage = PWM Mode Operation
Feedback Leakage
OVP Threshold
OVP Hysteresis
OVP Leakage
NMOS Switch Leakage
NMOS Switch On Resistance
NMOS Switch On Resistance
NMOS Switch On Resistance
V FB = 0.8V
Rising Threshold
Measured at OVP Pin
OVP = 0.8V
Switch A, B, C, D, V IN = V OUT = 12V
Switch A
Switch B, C
Switch D
l
0.778
0.78
0.8
0
0.83
20
0
1
40
50
60
0.818
50
0.88
100
10
V
nA
V
mV
nA
μA
Input Current Limit
Peak Current Limit
Burst Current Limit
L = 4.7μH
L = 4.7μH
L = 4.7μH
l
4.5
7
0.7
6
10
1.3
8.5
12
2
A
A
A
Burst Zero Current Threshold
L = 4.7μH
0.3
A
Reverse Current Limit
I OUT Accuracy (Note 5)
L = 4.7μH
SW2 to V OUT Current = 1.5A
SW2 to V OUT Current = 1.0A
SW2 to V OUT Current = 0.5A
–0.5
32
20
8
–1
36
24
12
–1.5
40
28
16
A
μA
μA
μA
Maximum Duty Cycle
Minimum Duty Cycle
Buck (Switch A On)
Boost (Switch C On)
Buck (Switch A On)
Boost (Switch C On)
l
l
l
l
80
75
5
87
82
12
0
%
%
%
%
Frequency
SYNC Frequency Range (Note 7)
PWM/SYNC Threshold
RUN Threshold
PWM/SYNC = 5V, V IN = V OUT = 12V
V CC = 2.7V or 5V
V IN = 2.7V or 15V
l
l
l
l
675
300
0.5
0.35
750
0.9
0.75
825
1500
1.5
1.5
kHz
kHz
V
V
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 LTC3112 is tested under pulsed load conditions such that
T J ≈T A . The LTC3112E is guaranteed to meet specifications from
0°C to 85°C junction temperature. Specifications over the –40°C to
125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTC3112I is guaranteed to meet specifications from –40°C to 125°C
junction temperature. 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
resistance and other environmental factors.
3
For more information www.linear.com/LTC3112
3112fb
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