参数资料
型号: LTC3735EUHF#PBF
厂商: Linear Technology
文件页数: 4/32页
文件大小: 0K
描述: IC CTRLR DC/DC 2PH HI EFF 38-QFN
标准包装: 52
应用: 控制器,Intel 移动式 CPU
输出数: 1
输出电压: 0.7 V ~ 1.71 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 38-WFQFN 裸露焊盘
供应商设备封装: 38-QFN(5x7)
包装: 管件
LTC3735
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25°C. V PVCC = 5V, V RUN/SS = 5V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Oscillator
I FREQSET
FREQSET Input Current
V FREQSET = 0V
–2
–1
μA
f NOM
f LOW
f HIGH
Nominal Frequency
Lowest Frequency
Highest Frequency
V FREQSET = 1.2V
V FREQSET = 0V
V FREQSET ≥ 2.4V
320
190
490
355
210
550
390
240
610
kHz
kHz
kHz
PGOOD Output
V PGL
I PGOOD
PGOOD Voltage Low
PGOOD Leakage Current
I PGOOD = 2mA
V PGOOD = 5V
0.1
0.3
±1
V
μA
V PG
t MASK
PGOOD Trip Thresholds
PGOOD Mask Timer
V FB with Respect to Set Output Voltage
V FB Ramping Negative
V FB Ramping Positive
–7
7
100
–10
11
110
–13
13
120
%
%
μs
t DELAY
MCH_PG Delay Time
15
cycles
Operational Amplifier
I B
Input Bias Current
15
200
nA
V OS
CM
Input Offset Voltage Magnitude
Common Mode Input Voltage Range
V OA + = V OA – 1.2V, I OUT = 1mA
0
0.8
5
P VCC – 1.4
mV
V
CMRR
Common Mode Rejection Ratio
I OUT = 1mA
46
70
dB
I CL
A VOL
GBP
SR
Output Source Current
Open-Loop DC Gain
Gain-Bandwidth Product
Slew Rate
I OUT = 1mA
I OUT = 1mA
R L = 2k
10
35
30
2
5
mA
V/mV
MHz
V/μs
V O(MAX)
Maximum High Output Voltage
I OUT = 1mA
P VCC – 1.2 P VCC – 0.9
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 LTC3735E is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the – 40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: T J is calculated from the ambient temperature T A and power
dissipation P D according to the following formula:
LTC3735EG: T J = T A + (P D ? 85°C/W)
LTC3735EUHF: T J = T A + (P D ? 34°C/W)
Note 4: The LTC3735 is tested in a feedback loop that servos V ITH to a
specified voltage and measures the resultant V FB .
Note 5: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Note 6: Rise and fall times are measured using 10% and 90% levels. Delay
times are measured using 50% levels.
Note 7: The minimum on-time condition corresponds to the on inductor
peak-to-peak ripple current ≥ 40% I MAX (see Minimum On-Time
Considerations in the Applications Information section).
Note 8: The ATTEN ERR specification is in addition to the output voltage
accuracy specified at VID code = 010110.
3735fa
4
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