LTM4639
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified internal
operating temperature range (Note 2), otherwise specifications are at TA = 25°C. VIN = 3.3V, CPWR = 5V, per the typical application in
Figure 22.
SYMBOL
PARAMETER
CONDITIONS
(Note 7)
MIN
TYP
1
MAX
UNITS
V/V
A
Differential Gain
Slew Rate
V
SR
(Note 6)
2
V/µs
MHz
dB
GBP
CMRR
Gain Bandwidth Product
(Note 6)
3
Common Mode Rejection (Note 7)
60
I
DIFF_OUT Current
Sourcing
2
mA
DIFF_OUT
PSRR
Power Supply Rejection
Ratio
5V < V < 7V (Note 7)
100
80
dB
IN
C
V
Tracking V
PWR
IN
R
Input Resistance
+ to GND
kΩ
IN
OSNS
PGOOD Output
V
PGOOD Trip Level
V
With Respect to Set Output
FB
FB
PGOOD
FB
V
V
–10
10
%
%
Ramping Negative
Ramping Positive
V
PGOOD Voltage Low
I
= 2mA
0.1
0.3
5.2
V
PGL
PGOOD
INTV Linear Regulator
CC
V
Source Output
5V < V < 7V, C
Tracking V
IN
4.8
4.5
5
2
V
%
INTVCC
IN
PWR
V
V
V
INTV Load Regulation
I
= 0 to 40mA, C
= 5.5V
LDOINT
EXTVCC
LDOEXT
CC
CC
PWR
l
External V Switchover
EXTV Ramping Positive, C
= 5.5V, INTV Output 5V
4.7
75
V
CC
CC
PWR
CC
EXTV Voltage Drop
I
= 25mA, V
= 5V, C = 5.5V
PWR
220
800
mV
CC
CC
EXTVCC
Oscillator and Phase-Locked Loop
f
Frequency Sync Capture
Range
MODE_PLLIN Clock Duty Cycle = 50%
250
kHz
SYNC
f
f
f
I
Nominal Frequency
Lowest Frequency
Highest Frequency
Frequency Set Current
V
V
V
= 1.2V
= 0V
450
210
700
9
500
250
770
10
550
290
850
11
kHz
kHz
kHz
µA
NOM
LOW
HIGH
FREQ
fSET
fSET
fSET
≥ 2.4V
R
MODE_PLLIN Input
Resistance
250
kΩ
MODE_PLLIN
V
V
Clock Input Level High
Clock Input Level Low
2.0
V
V
IH_MODE_PLLIN
IL_MODE_PLLIN
0.8
Temperature Diode
V
TEMP Diode Voltage
I
= 100µA
0.6
–2
V
TEMP
TEMP
l
TC V
Temperature Coefficient
mV/°C
TEMP
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.
determined by specific operating conditions in conjunction with board
layout, the rated package thermal resistance and other environmental
factors.
Note 3: The minimum on-time condition is specified for a peak-to-peak
Note 2: The LTM4639 is tested under pulsed load conditions such that
inductor ripple current of ~40% of I
Information section)
Load. (See the Applications
MAX
T ≈ T . The LTM4639E is guaranteed to meet performance specifications
J
A
over the 0°C to 125°C internal operating temperature range. Specifications
over the full –40°C to 125°C internal operating temperature range are
assured by design, characterization and correlation with statistical process
controls. The LTM4639I is guaranteed to meet specifications over the
full –40°C to 125°C internal operating temperature range. Note that the
maximum ambient temperature consistent with these specifications is
Note 4: See output current derating curves for different V , V
Note 5: Limit current into the RUN pin to less than 2mA.
Note 6: Guaranteed by design.
Note 7: 100% tested at wafer level.
and T .
A
IN OUT
4639f
4
For more information www.linear.com/LTM4639
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