Datasheet

LTM4611
4
4611fb
For more information www.linear.com/LTM4611
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Control Section
V
FB
Voltage at V
FB
Pin I
OUT
= 0A, V
OUT
= V
FB
l
0.783 0.797 0.811 V
I
FB
–10 nA
V
OVL
Feedback Overvoltage Lockout
l
0.84 0.87 0.89 V
I
TRACK/SS
Track Pin Soft-Start Pull-Up
Current
TRACK/SS = 0V 0.9 1.4 1.9 µA
t
ON(MIN)
Minimum On-Time (Note 5) 90 ns
R
FBHI
Resistor Between V
OUT_LCL
and V
FB
Pins
60.05 60.40 60.75 kΩ
V
OSNS
+
,
V
OSNS
–
CM RANGE
Common Mode Input Range V
IN
= 3.3V, Run > 1.5V 0 INTV
CC
– 1 V
DIFFV
OUT
Range DIFF_AMP Output Voltage Range V
IN
= 3.3V, DIFFV
OUT
Load = 100k 0 INTV
CC
V
V
OS
DIFF_AMP Input Offset Voltage
Magnitude
l
1.25
2
mV
mV
A
V
DIFF_AMP Differential Gain 1 V/V
V
PGOOD
PGOOD Trip Level V
FB
with Respect to Set Output
V
FB
Ramping Positive, PGOOD Transitioning
V
FB
Ramping Positive, PGOOD Transitioning
V
FB
Ramping Negative, PGOOD Transitioning
V
FB
Ramping Negative, PGOOD Transitioning
–10
5
5
–10
–7.5
7.5
7.5
–7.5
–5
10
10
–5
%
%
%
%
SR DIFF_AMP Slew Rate 2 V/µs
GBP DIFF_AMP Gain-Bandwidth
Product
3 MHz
CMRR DIFF_ AMP Common Mode
Rejection
100 dB
R
IN
DIFF_ AMP Input Resistance V
OSNS
+ to GND 19.9 20.0 20.1 kΩ
INTV
CC
Linear Regulator
V
INTVCC
Internal V
CC
Voltage 1.5V < V
IN
< 5.5V 4.8 5 5.2 V
V
INTVCC
Load Reg INTV
CC
Load Regulation I
CC
= 0 to 50mA 0.5 %
Oscillator and Phase-Locked Loop
f
S
Output Ripple Voltage Frequency V
IN
= 3.3V, V
OUT
= 1.5V,
0.85V ≤ PLLFLTR/f
SET
≤ 2.0V
280 835 kHz
f
SYNC
SYNC Capture Range 360 710 kHz
PLLFLTR/f
SET(FLOAT)
PLLFLTR/f
SET
Open-Circuit
Voltage
PLLFLTR/f
SET
Pin Voltage When Floating 1.23 V
Frequency Nominal Nominal Frequency PLLFLTR/f
SET
Floating 500 kHz
Frequency Low Lowest Frequency PLLFLTR/f
SET
= 0.85V 330 kHz
Frequency High Highest Frequency PLLFLTR/f
SET
= 2.0V 780 kHz
I
PLLFLTR
PLLFLTR
Sourcing Capability
Sinking Capability
Mode_PLLIN Frequency > f
OSC
Mode_PLLIN Frequency < f
OSC
–13
13
µA
µA
R
MODE(PLLIN)
Mode_PLLIN Input Resistance 250 kΩ
V
IH
Clock Input Level High 2.0 V
V
IL
Clock Input Level Low 0.6 V
Mode_PLLIN
Clock
Clock Input Duty Cycle Range 40 50 60 %
elecTrical characTerisTics
The l denotes the specifications which apply over the full internal operating
junction temperature range, otherwise specifications are at T
A
= 25°C, V
IN
= 3.3V, per the typical application in Figure 21.