ltc3827ig-1 Linear Technology Corporation, ltc3827ig-1 Datasheet - Page 2

• Manufacturer Part Number: ltc3827ig-1
• Description: Low Iq, Dual, 2-phase Synchronous Step-down Controller
• Manufacturer: Linear Technology Corporation

ABSOLUTE AXI U RATI GS
(Note 1)
ORDER INFORMATION
LEAD FREE FINISH
LTC3827EG-1#PBF
LTC3827IG-1#PBF
LEAD FREE FINISH
LTC3827EG-1
LTC3827IG-1
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to:
For more information on tape and reel specifications, go to:
LTC3827-1
Input Supply Voltage (V
Top Side Driver Voltages
Switch Voltage (SW1, SW2) .........................36V to – 5V
(BOOST1-SW1), (BOOST2-SW2) ...............8.5V to – 0.3V
RUN1, RUN2 .............................................. 7V to – 0.3V
SENSE1
PLLIN/MODE, PLLLPF, TRACK/SS1, TRACK/SS2
EXTV
I
PGOOD1 Voltage ...................................... 8.5V to –0.3V
Peak Output Current <10μs (TG1, TG2, BG1, BG2) ... 3A
INTV
Operating Temperature Range (Note 2) .. – 40°C to 85°C
Junction Temperature (Note 3) ............................. 125°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
ELECTRICAL CHARACTERISTICS
SYMBOL
Main Control Loops
V
I
V
V
g
2
temperature range, otherwise specifications are at T
VFB1, 2
TH1,
FB1, 2
REFLNREG
LOADREG
m1, 2
(BOOST1, BOOST2) ...............................42V to – 0.3V
SENSE2
Voltages .......................................... INTV
CC
I
CC
TH2
Peak Output Current ................................ 50mA
+
......................................................10V to – 0.3V
, V
, SENSE2
–
PARAMETER
Regulated Feedback Voltage
Feedback Current
Reference Voltage Line Regulation
Output Voltage Load Regulation
Transconductance Amplifier g
FB1
Voltages ................................11V to – 0.3V
, V
FB2
W
TAPE AND REEL
LTC3827EG-1#TRPBF
LTC3827IG-1#TRPBF
TAPE AND REEL
LTC3827EG-1#TR
LTC3827IG-1#TR
+
, SENSE1
Voltages ..................2.7V to – 0.3V
IN
).........................36V to – 0.3V
W W
–
,
m
PART MARKING
3827EG-1
3827IG-1
PART MARKING
3827EG-1
3827IG-1
CONDITIONS
(Note 4); I
(Note 4)
V
(Note 4)
Measured in Servo Loop; ΔI
Measured in Servo Loop; ΔI
I
TH1, 2
http://www.linear.com/leadfree/
IN
= 4V to 30V (Note 4)
U
CC
http://www.linear.com/tapeandreel/
= 1.2V; Sink/Source 5μA (Note 4)
A
= 25°C. V
to – 0.3V
TH1, 2
The
Voltage = 1.2V
●
IN
denotes the specifications which apply over the full operating
= 12V, V
PACKAGE DESCRIPTION
28-Lead Plastic SSOP
28-Lead Plastic SSOP
PACKAGE DESCRIPTION
28-Lead Plastic SSOP
28-Lead Plastic SSOP
PIN CONFIGURATION
TH
TH
Voltage = 1.2V to 0.7V
Voltage = 1.2V to 2V
RUN/SS1, 2
PLLIN/MODE
TRACK/SS2
= 5V unless otherwise noted.
SENSE1
SENSE1
SENSE2
SENSE2
PLLLPF
SGND
RUN1
RUN2
V
V
I
I
TH1
TH2
FB1
FB2
+
–
–
+
T
JMAX
28-LEAD PLASTIC SSOP
10
11
12
13
14
1
2
3
4
5
6
7
8
9
= 125°C, θ
●
●
●
G PACKAGE
TOP VIEW
TEMPERATURE RANGE
–40ºC to 85ºC
–40ºC to 85ºC
TEMPERATURE RANGE
–40ºC to 85ºC
–40ºC to 85ºC
0.792
MIN
JA
= 95°C/W
28
27
26
25
24
23
22
21
20
19
18
17
16
15
0.800
0.002
– 0.1
1.55
TYP
– 5
TRACK/SS1
PGOOD1
TG1
SW1
BOOST1
BG1
V
PGND
EXTV
INTV
BG2
BOOST2
SW2
TG2
0.1
IN
CC
CC
0.808
MAX
– 0.5
0.02
– 50
0.5
UNITS
mmho
38271fd
%/V
nA
%
%
V