RUN1, RUN2, RUN3 Voltages..................... –0.3V to 65V
SENSE1
+
, SENSE2
+
, SENSE1
–
SENSE2
–
Voltages ..................................... –0.3V to 65V
SENSE3
+
, SENSE3
–
Voltages ..................... –0.3V to 65V
PLLIN/MODE, FREQ, DRVSET Voltages ....... –0.3V to 6V
EXTV
CC
Voltage ......................................... –0.3V to 14V
ITH1, ITH2, ITH3, V
FB1
, V
FB2
Voltages ......... –0.3V to 6V
V
FB3
Voltage............................................... –0.3V to 65V
VPRG3, Voltage ........................................... –0.3V to 6V
TRACK/SS1, TRACK/SS2, SS3 Voltages...... –0.3V to 6V
Operating Junction Temperature Range (Note 2)
LTC3899E, LTC3899I ......................... –40°C to 125°C
LTC3899H .......................................... –40°C to 150°C
LTC3899MP ....................................... –55°C to 150°C
Storage Temperature Range .................. –65°C to 150°C
PIN CONFIGURATION
TOP VIEW
SENSE1
–
SENSE1
+
ITH1
V
FB1
SENSE1
+
SENSE1
–
FREQ
PLLIN/MODE
SS3
SENSE3
+
SENSE3
–
1
2
3
4
5
6
7
8
9
39
GND
38 VPRG3
37 TRACK/SS1
36 TG1
35 SW1
34 BOOST1
33 BG1
32 SW3
31 TG3
30 BOOST3
29 BG3
28 V
BIAS
27 EXTV
CC
26 DRV
CC
25 BG2
24 BOOST2
23 SW2
22 TG2
21 TRACK/SS2
20 DRVSET
FREQ 1
PLLIN/MODE 2
SS3 3
SENSE3
+
–
TRACK/SS1
TOP VIEW
VPRG3
ITH1
V
FB1
38 37 36 35 34 33 32
31 SW1
30 BOOST1
29 BG1
28 SW3
27 TG3
39
GND
26 BOOST3
25 BG3
24 V
BIAS
23 EXTV
CC
22 DRV
CC
21 BG2
20 BOOST2
13 14 15 16 17 18 19
V
FB2
ITH2
DRVSET
TRACK/SS2
TG2
SENSE2
+
SW2
4
5
SENSE3
V
FB3
10
ITH3 11
INTV
CC
12
RUN1 13
RUN2 14
RUN3 15
SENSE2
–
16
SENSE2
+
17
V
FB2
18
ITH2 19
V
FB3
6
ITH3 7
INTV
CC
8
RUN1 9
RUN2 10
RUN3 11
SENSE2 12
–
FE PACKAGE
38-LEAD PLASTIC TSSOP
T
JMAX
= 150°C,
θ
JA
= 25°C/W
EXPOSED PAD (PIN 39) IS GND, MUST BE SOLDERED TO PCB
UHF PACKAGE
38-LEAD (5mm
×
7mm) PLASTIC QFN
T
JMAX
= 150°C,
θ
JA
= 34°C/W
EXPOSED PAD (PIN 39) IS GND, MUST BE SOLDERED TO PCB
TG1
2
3899fa
For more information
www.linear.com/LTC3899
LTC3899
ORDER INFORMATION
LEAD FREE FINISH
LTC3899EFE#PBF
LTC3899IFE#PBF
LTC3899HFE#PBF
LTC3899MPFE#PBF
LTC3899EUHF#PBF
LTC3899IUHF#PBF
LTC3899HUHF#PBF
LTC3899MPUHF#PBF
TAPE AND REEL
LTC3899EFE#TRPBF
LTC3899IFE#TRPBF
LTC3899HFE#TRPBF
LTC3899MPFE#TRPBF
LTC3899EUHF#TRPBF
LTC3899IUHF#TRPBF
LTC3899HUHF#TRPBF
LTC3899MPUHF#TRPBF
PART MARKING*
LTC3899FE
LTC3899FE
LTC3899FE
LTC3899FE
3899
3899
3899
3899
PACKAGE DESCRIPTION
38-Lead Plastic TSSOP
38-Lead Plastic TSSOP
38-Lead Plastic TSSOP
38-Lead Plastic TSSOP
38-Lead (5mm
×
7mm) Plastic QFN
38-Lead (5mm
×
7mm) Plastic QFN
38-Lead (5mm
×
7mm) Plastic QFN
38-Lead (5mm
×
7mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–55°C to 150°C
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–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 nonstandard 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/
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
BIAS
= 12V, V
RUN1,2,3
= 5V, V
EXTVCC
= 0V, V
DRVSET
=
0V, VPRG3 = Float unless otherwise noted.
SYMBOL
V
BIAS
V
FB1,2
V
FB3
PARAMETER
Bias Input Supply Operating Voltage Range
Buck Regulated Feedback Voltage
(Note 4) ITH1,2 Voltage = 1.2V
0°C to 85°C
l
ELECTRICAL CHARACTERISTICS
CONDITIONS
MIN
4.5
0.792
0.788
1.182
9.78
11.74
TYP
MAX
60
UNITS
V
V
V
V
V
V
nA
µA
µA
µA
%/V
%
%
mmho
0.800
0.800
1.200
10.00
12.00
–2
±0.01
4
5
0.002
0.808
0.812
1.218
10.22
12.26
±50
±0.05
6
7
0.02
0.1
–0.1
Boost Regulated Feedback Voltage
(Note 4) ITH3 Voltage = 1.2V
VPRG3 = FLOAT
VPRG3 = 0V
VPRG3 = INTV
CC
(Note 4)
(Note 4)
VPRG3 = FLOAT
VPRG3 = 0V
VPRG3 = INTV
CC
(Note 4) V
BIAS
= 4.5V to 60V
(Note 4) Measured in Servo Loop,
∆ITH
Voltage = 1.2V to 0.7V
(Note 4) Measured in Servo Loop,
∆ITH
Voltage = 1.2V to 2V
l
l
l
I
FB1,2
I
FB3
Buck Feedback Current
Boost Feedback Current
V
REFLNREG
V
LOADREG
Reference Voltage Line Regulation
Output Voltage Load Regulation
l
l
0.01
–0.01
2
g
m1,2,3
Transconductance Amplifier g
m
(Note 4) ITH1,2,3 = 1.2V, Sink/Source 5µA
3899fa
For more information
www.linear.com/LTC3899
3
LTC3899
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
BIAS
= 12V, V
RUN1,2,3
= 5V, V
EXTVCC
= 0V, V
DRVSET
=
0V, VPRG3 = Float unless otherwise noted.
SYMBOL
I
Q
PARAMETER
Input DC Supply Current
Pulse-Skipping or Forced Continuous Mode
(One Channel On)
CONDITIONS
(Note 5), V
DRVSET
= 0V
RUN1 = 5V and RUN2,3 = 0V or
RUN2 = 5V and RUN1,3 = 0V or
RUN3 = 5V and RUN1,2 = 0V,
V
FB1,2
= 0.83V (No Load), V
FB3
= 1.25V
RUN1,2,3 = 5V, V
FB1,2
= 0.83V (No Load),
V
FB3
= 1.25V
RUN1 = 5V and RUN2,3 = 0V or
RUN2 = 5V and RUN1,3 = 0V
V
FB1,2
= 0.83V (No Load)
RUN3 = 5V and RUN1,2 = 0V, V
FB3
= 1.25V
RUN1 = 5V and RUN2 = 0V or
RUN2 = 5V and RUN1 = 0V, RUN3 = 5V,
V
FB1,2
= 0.83V (No Load), V
FB3
= 1.25V
RUN1,2,3 = 5V, V
FB1,2
= 0.83V (No Load),
V
FB3
= 1.25V
RUN1,2,3 = 0V
DRV
CC
Ramping Up
DRVSET = 0V or R
DRVSET
≤ 100kΩ
DRVSET = INTV
CC
DRV
CC
Ramping Down
DRVSET = 0V or R
DRVSET
≤ 100kΩ
DRVSET = INTV
CC
V
OVL1,2
I
SENSE1,2
+
I
SENSE3
+
I
SENSE1,2
–
I
SENSE3
–
DF
MAX(TG)
DF
MAX(BG)
I
TRACK/SS1,2
I
SS
V
RUN1,2,3
ON
V
SENSE(MAX)
V
SENSE(CM)
Gate Driver
TG1,2,3
BG1,2,3
Pull-Up On-Resistance
Pull-Down On-Resistance
Pull-Up On-Resistance
Pull-Down On-Resistance
V
DRVSET
= INTV
CC
V
DRVSET
= INTV
CC
2.2
1.0
2.2
1.0
Ω
Ω
Ω
Ω
3899fa
ELECTRICAL CHARACTERISTICS
MIN
TYP
1.6
1.6
0.8
3
MAX
UNITS
mA
Pulse-Skipping or Forced Continuous Mode
(All Channels On)
Sleep Mode (One Channel On, Buck)
mA
55
µA
l
29
Sleep Mode (One Channel On, Boost)
Sleep Mode (Buck and Boost Channel On)
29
34
50
55
µA
µA
Sleep Mode (All Three Channels On)
Shutdown
UVLO
Undervoltage Lockout
39
3.6
l
l
l
l
60
10
4.2
7.8
4.0
7.0
13
±1
µA
µA
V
V
V
V
%
µA
µA
4.0
7.5
3.6
6.4
7
3.8
6.7
10
170
Buck Feedback Overvoltage Protection
SENSE
+
Pin Current
SENSE
+
Pin Current
SENSE
–
Pins Current
SENSE
–
Pin Current
Maximum Duty Factor for TG
Maximum Duty Factor for BG
Soft-Start Charge Current
Soft-Start Charge Current
RUN Pin On Threshold
Maximum Current Sense Threshold
SENSE3 Pins Common Mode Range
(BOOST Converter Input Supply Voltage)
Measured at V
FB1,2
Relative to Regulated V
FB1,2
Bucks (Channels 1 and 2)
Boost (Channel 3)
Bucks (Channels 1 and 2)
V
OUT1,2
< V
INTVCC
– 0.5V
V
OUT1,2
> V
INTVCC
+ 0.5V
Boost (Channel 3) V
SENSE
+, V
SENSE
– = 12V
Bucks (Channels 1,2) in Dropout, FREQ = 0V
Boost (Channel 3) in Overvoltage
Bucks (Channels 1,2) in Overvoltage
Boost (Channel 3)
V
TRACK/SS1,2
= 0V
V
SS3
= 0V
V
RUN1
, V
RUN2
, V
RUN3
Rising
V
FB1,2
= 0.7V, V
SENSE1,2
– = 3.3V,
V
FB3
= 1.1V, V
SENSE3
+ = 12V
l
700
97.5
99
100
100
96
8
8
1.22
65
2.2
10
10
1.275
75
l
±1
±1
µA
µA
µA
%
%
%
%
12
12
1.33
85
60
µA
µA
V
mV
mV
V
V
RUN1,2,3
Hyst RUN Pin Hysteresis
75
4
For more information
www.linear.com/LTC3899
LTC3899
The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
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