Datasheet

LTC3766
3
3766fa
For more information www.linear.com/LTC3766
elecTrical characTerisTics
The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C. (Note 2) V
IN
= 15V, GND = PGND = 0V, unless otherwise noted.
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3766EGN#PBF LTC3766EGN#TRPBF LTC3766GN 28-Lead Narrow Plastic SSOP –40°C to 125°C
LTC3766IGN#PBF LTC3766IGN#TRPBF LTC3766GN 28-Lead Narrow Plastic SSOP –40°C to 125°C
LTC3766HGN#PBF LTC3766HGN#TRPBF LTC3766GN 28-Lead Narrow Plastic SSOP –40°C to 150°C
LTC3766MPGN#PBF LTC3766MPGN#TRPBF LTC3766GN 28-Lead Narrow Plastic SSOP –55°C to 150°C
LTC3766EUFD#PBF LTC3766EUFD#TRPBF 3766
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LTC3766IUFD#PBF LTC3766IUFD#TRPBF 3766
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LTC3766HUFD#PBF LTC3766HUFD#TRPBF 3766
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 150°C
LTC3766MPUFD#PBF LTC3766MPUFD#TRPBF 3766
28-Lead (4mm × 5mm) Plastic QFN
–55°C to 150°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Main Control Loop
V
FB
Regulated Feedback Voltage (Note 4) ITH = 1.2V
l
0.592 0.600 0.608 V
I
FB
Feedback Input Current (Note 4) 2 50 nA
ΔV
FB(LINREG)
Feedback Voltage Line Regulation V
IN
= 5V to 32V, ITH = 1.2V 0.001 %/V
ΔV
FB(LOADREG)
Feedback Voltage Load Regulation Measured in Servo Loop, ITH = 0.5V to 2V
l
–0.01 –0.1 %
V
ISAVG
Average Current Sense Threshold Resistor Sense (RS) Mode
Current Transformer (CT) Mode
47
0.66
55
0.73
63
0.80
mV
V
V
ISADJ
Current Sense Ripple Compensation RS Mode
CT Mode
V
SW
= 10V, V
S
+
= 5V, FS/SYNC = V
CC
,
R
IPK
= 23.7k
10
140
mV
mV
V
ISOC
Overcurrent Shutdown Threshold RS Mode: V
IS
–
= 0V
CT Mode: V
IS
–
= V
CC
86
1.22
100
1.33
113
1.44
mV
V
I
SIN
I
S
+
and I
S
–
Input Current 280 500 nA
g
m
Error Amplifier g
m
2.2 2.7 3.2 mS
R
EA
Error Amplifier Output Resistance (Note 7) 5 MΩ
I
SOFT(C)
Soft-Start Charge Current V
SS
= 2V 4 5 6 μA
I
SOFT(D)
Soft-Start Discharge Current V
SS
= 2V 3 μA
V
RUNR
RUN Pin On Threshold V
RUN
Rising
l
1.18 1.22 1.26 V
V
RUNF
RUN Pin Off Threshold V
RUN
Falling
l
1.13 1.17 1.21 V
I
RUN
RUN Pin Hysteresis Current V
RUN
= 0.5V 2.2 3.0 3.6 μA
t
ON(MIN)
Minimum Controllable On Time 200 ns
D
MAX
Maximum Duty Cycle FGD = SGD = GND 77 79 81 %
ΔV
SEC(TH)
Volt-Second Limit Threshold Accuracy 2V ≤ V
SW
< 5V
5V ≤ V
SW
≤ 40V
–6
–4
6
4
%
%
R
VSDN
Volt-Second Discharge Resistance 75 Ω
V
SWCL
SW Clamp Voltage I
SW
= 1mA 43 51 60 V
ΔV
FB(OV)
Output Overvoltage Threshold V
FB
Rising 15 17 19 %