參數(shù)資料
型號(hào)： LTC3738CUHF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 3-Phase Buck Controller for Intel VRM9/VRM10 with Active Voltage Positioning
中文描述： 5 A SWITCHING CONTROLLER, 630 kHz SWITCHING FREQ-MAX, PQCC38
封裝： 7 X 5 MM, PLASTIC, M0-220WHKD, QFN-38
文件頁數(shù)： 4/32頁
文件大?。?/td> 316K
代理商： LTC3738CUHF
4
LTC3738
3738f
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
A
= 25
°
C. V
CC
= V
OUTEN
= V
SS
= 5V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
Oscillator and Phase-Locked Loop
f
NOM
Nominal Frequency
V
PLLFLTR
= 1.2V
f
LOW
Lowest Frequency
V
PLLFLTR
= 0V
f
HIGH
Highest Frequency
V
PLLFLTR
= 2.4V
R
FCB
FCB Clock
Input Threshold
I
PLL LPF
Phase Detector Output Current
Sinking Capability
f
PLLIN
< f
OSC
Sourcing Capability
f
PLLIN
> f
OSC
R
RELPHS
Controller 2-Controller 1 Phase
Controller 3-Controller 1 Phase
No_CPU Detection
t
NOCPU
No-CPU Shutdown Latency
After All VID Bits = “1”
Differential Amplifier
A
V
Differential Gain
V
OS
Input Offset Voltage
CM
Common Mode Input Voltage Range
CMRR
Common Mode Rejection Ratio
0V < IN
+
= IN
–
< 5V,
Input Referred
GBP
Gain Bandwidth Product
V
O(MAX)
Maximum High Output Voltage
R
IN
Input Resistance
Active Voltage Positioning
I
SINK
Sinking Current Ability of AVP Pin
I
SOURCE
Sourcing Current Ability of AVP Pin
V
AVP
– V
O(MAX)
Max Voltage Drops V
AVP
to VO
Thermal Detection
V
INT
Thermal Comparator Trip Threshold
V
INT_HYS
Hysteresis
V
TH_TH
Internal Detection Enable Threshold
The
●
denotes the specifications which apply over the full operating
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
T
J
is calculated from the ambient temperature T
A
and power
dissipation P
D
according to the following formula:
T
J
= T
A
+ (P
D
×
34
°
C/W)
Note 3:
The IC is tested in a feedback loop that includes the differential
amplifier driving the VID DAC into the error amplifier and servoing the
resultant voltage to the midrange point for the error amplifier (V
ITH
= 1.2V).
Note 4:
Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Note 5:
The minimum on-time condition corresponds to an inductor peak-
to-peak ripple current of
≥
40% of I
MAX
(see minimum on-time
considerations in the Applications Information Section).
Note 6:
ATTEN
ERR
specification is in addition to the output voltage
accuracy specified at VID code 110101.
Note 7:
This IC includes overtemperature protection that is intended to protect
the device during momentary overload conditions. Junction temperature will
exceed 125
°
C when overtemperature protection is active. Continuous operation
above the specified maximum operating junction temperature may impair
device reliability.
MIN
TYP
MAX
UNITS
325
190
480
365
220
550
1.2
415
250
630
kHz
kHz
kHz
V
20
20
120
240
μ
A
μ
A
Deg
Deg
0.5
1
μ
s
1.000
0.5
V/V
mV
IN
+
= IN
–
= 1.2V, Input Referred
0
5
V
70
dB
2
MHz
V
CC
– 0.8
160
V
Measured at IN
+
Pin
k
IN
+
= 1.2V
IN
+
= 1.2V
IN
+
= 1.2V, V
IN
= 60mV
0.250
1.4
180
mA
mA
mV
1.67
0.21
V
CC
– 1
V
V
V
3.4
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