LTC3407-4
13
34074fa
TYPICAL APPLICATIONS
Low Ripple Buck Regulators Using Ceramic Capacitors
Effi ciency vs Load Current
1mm Height Core Supply
Effi ciency vs Load Current
RUN2 V
IN
V
IN
2.5V TO 5.5V
V
OUT2
1.8V
800mA
V
OUT1
1.2V
800mA
RUN1
POR
SW1
V
FB1
GND
V
FB2
SW2
MODE/SYNC
LTC3407-4
C1
10μF
R5
100k
POWER-ON
RESET
C4, 22pFC5, 22pF
L1
4.7μH
L2
4.7μH
R4
887k
R2
604k
R1
604k
R3
442k
C3
10μF
C2
10μF
3407 TA03
C1, C2, C3: TAIYO YUDEN JMK316BJ106ML L1, L2: SUMIDA CDRH2D18/HP-4R7NC
LOAD CURRENT (mA)
10
50
EFFICIENCY (%)
60
70
80
90
100 1000
34074 TA03b
100
55
65
75
85
95
V
IN
= 3.6V
PULSE-SKIPPING MODE
NO LOAD ON OTHER CHANNEL
V
OUT
= 1.8V
V
OUT
= 1.2V
RUN2 V
IN
V
IN
3.6V TO 5.5V
V
OUT2
3.3V
800mA
V
OUT1
1.8V
800mA
RUN1
POR
SW1
V
FB1
GND
V
FB2
SW2
MODE/SYNC
LTC3407-4
C1*
10μF
R5
100k
POWER-ON
RESET
C4, 22pFC5, 100pF
L1
2.2μH
L2
2.2μH
R4
887k
R2
604k
R1
301k
R3
196k
C3
10μF
C2
10μF
3407 TA07
C1, C2, C3: TAIYO YUDEN JMK212BJ106MD-B
L1, L2: COILTRONICS LPO3310-222MX
*IF C1 IS GREATER THAN 3" FROM POWER SOURCE,
ADDITIONAL CAPACITANCE MAY BE REQUIRED.
LOAD CURRENT (mA)
1
70
EFFICIENCY (%)
75
80
85
90
10 100 1000
34074 TA08
65
60
55
50
95
100
V
IN
= 5V
Burst Mode OPERATION
NO LOAD ON OTHER CHANNEL
V
OUT
= 3.3V
V
OUT
= 1.8V
LTC3407-4
14
34074fa
PACKAGE DESCRIPTION
3.00 p0.10
(4 SIDES)
NOTE:
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-2).
CHECK THE LTC WEBSITE DATA SHEET FOR CURRENT STATUS OF VARIATION ASSIGNMENT
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE
TOP AND BOTTOM OF PACKAGE
0.40 p 0.10
BOTTOM VIEW—EXPOSED PAD
1.65 p 0.10
(2 SIDES)
0.75 p0.05
R = 0.125
TYP
2.38 p0.10
(2 SIDES)
15
106
PIN 1
TOP MARK
(SEE NOTE 6)
0.200 REF
0.00 – 0.05
(DD) DFN REV B 0309
0.25 p 0.05
2.38 p0.05
(2 SIDES)
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
1.65 p0.05
(2 SIDES)
2.15 p0.05
0.50
BSC
0.70 p0.05
3.55 p0.05
PACKAGE
OUTLINE
0.25 p 0.05
0.50 BSC
DD Package
10-Lead Plastic DFN (3mm × 3mm)
(Reference LTC DWG # 05-08-1699 Rev B)
LTC3407-4
15
34074fa
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
PACKAGE DESCRIPTION
MSOP (MSE) 0908 REV C
0.53 p 0.152
(.021 p .006)
SEATING
PLANE
0.18
(.007)
1.10
(.043)
MAX
0.17 – 0.27
(.007 – .011)
TYP
0.86
(.034)
REF
0.50
(.0197)
BSC
12
3
45
4.90 p 0.152
(.193 p .006)
0.497 p 0.076
(.0196 p .003)
REF
8910
10
1
7
6
3.00 p 0.102
(.118 p .004)
(NOTE 3)
3.00 p 0.102
(.118 p .004)
(NOTE 4)
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
0.254
(.010)
0o – 6o TYP
DETAIL “A”
DETAIL “A”
GAUGE PLANE
5.23
(.206)
MIN
3.20 – 3.45
(.126 – .136)
0.889 p 0.127
(.035 p .005)
RECOMMENDED SOLDER PAD LAYOUT
0.305 p 0.038
(.0120 p .0015)
TYP
2.083 p 0.102
(.082 p .004)
2.794 p 0.102
(.110 p .004)
0.50
(.0197)
BSC
BOTTOM VIEW OF
EXPOSED PAD OPTION
1.83 p 0.102
(.072 p .004)
2.06 p 0.102
(.081 p .004)
0.1016 p 0.0508
(.004 p .002)
DETAIL “B”
DETAIL “B”
CORNER TAIL IS PART OF
THE LEADFRAME FEATURE.
FOR REFERENCE ONLY
NO MEASUREMENT PURPOSE
0.05 REF
0.29
REF
MSE Package
10-Lead Plastic MSOP, Exposed Die Pad
(Reference LTC DWG # 05-08-1664 Rev C)

LTC3407EMSE-4#PBF

Mfr. #:
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators Dual, Sync. 800mA, 2.25MHz Step-dwn Convrtr in MS10E
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union