LTC3850EUF#PBF Linear Technology, LTC3850EUF#PBF Datasheet - Page 38

• Manufacturer Part Number: LTC3850EUF#PBF
• Description: IC CNTRLR STP DWN SYNC 28-QFN
• Manufacturer: Linear Technology
• Series: PolyPhase®r
• Type: Step-Down (Buck)r

Specifications of LTC3850EUF#PBF

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 0.8 ~ 23.3 V
• Current - Output: 100mA
• Frequency - Switching: 250kHz ~ 780kHz
• Voltage - Input: 4 ~ 24 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-QFN
• Primary Input Voltage: 24V
• No. Of Outputs: 2
• Output Current: 100mA
• No. Of Pins: 28
• Operating Temperature Range: -40°C To +85°C
• Msl: MSL 1 - Unlimited
• Supply Voltage Range: 4V To 24V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

LTC3850/LTC3850-1
TYPICAL APPLICATION
RELATED PARTS
PART NUMBER DESCRIPTION
LTC1625/
LTC1775
LTC1735
LTC1778
LTC3727A-1
LTC3728
LTC3729
LTC3731
LTC3773
LTC3810
LTC3826
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LTC3834/
LTC3834-1
LT3845
PolyPhase is a registered trademark of Linear Technology Corporation. No R
38
L1, L2: VISHAY IHLP4040DZ-01 0.56µH
C
FOR SINGLE OUTPUT, DUAL PHASE OPERATION, TIE THE FOLLOWING PINS TOGETHER:
V
ITH1 TO ITH2
OUT
FB1
: SANYO 2R5TPE330M9
TO V
2.2nF
FB1
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
220pF
2.55k
1nF
20k
2.74k
0.1µF
No R
High Efficiency Synchronous Step-Down Switching Regulator
No R
Dual, 2-Phase Synchronous Controller
2-Phase 550kHz, Dual Synchronous Step-Down Controller
20A to 200A PolyPhase
3-Phase, Single Output From 250kHz to 600kHz Synchronous
Step-Down Controller
Triple Output DC/DC Synchronous Controller
100V Current Mode Synchronous Step-Down Switching Controller 0.8V ≤ V
Low I
Dual, 2-Phase Synchronous Step-Down Controller with Tracking
Low I
Low I
DC/DC Controller
TK/SS1 TO TK/SS2
RUN1 TO RUN2
RUN
SENSE
SENSE
Q
Q
Q
7.5k
, Dual, 2-Phase Synchronous Step-Down Controller
, Synchronous Step-Down Controller
, High Voltage Single Output Synchronous Step-Down
l
™ Current Mode Synchronous Step-Down Controllers
Wide Input Range Synchronous Step-Down Controller
FAX: [phone]
0.1µF
20k
TK/SS1
I
V
V
I
TK/SS2
SENSE2
SENSE2
SENSE1
TH1
TH2
FB1
FB2
0.1µF
–
+
20k
–
SGND
SENSE1
®
Figure 21. 1.1V/30A Dual Phase Core Converter, F
Synchronous Controllers
RUN2
+
RUN1 FREQ
RUN
LTC3850
I
l
LIM
www.linear.com
EXTV
PGOOD
CC
10k
MODE SW1 TG1
PGOOD
SW2 TG2
BOOST1
BOOST2
100k
INTV
PGND
BG1
BG2
V
CC
IN
SENSE
CMDSH-3
CMDSH-3
0.1µF
4.7µF
0.1µF
is a trademark of Linear Technology Corporation.
COMMENTS
97% Efficiency, No Sense Resistor, 16-Pin SSOP
Programmable Fixed Frequency from 200kHz to 550kHz
Up to 97% Efficiency, 4V ≤ V
I
Very Low Dropout; V
QFN and SSOP Packages, High Frequency for Smaller L and C
Expandable from 2-Phase to 12-Phase, Uses All Surface Mount
Components
0.6V ≤ V
Integrated MOSFET Drivers
3-Phase Step-Down DC/DC Controller,
3.3V ≤ V
30µA I
Up to Six Phases, 0.8V ≤ V
30µA I
1.23V ≤ V
OUT
2.2
Up to 20A
1µF
Q
Q
, 0.8V ≤ V
, 0.8V ≤ V
OUT
IN
OUT
OUT
≤ 36V, Fixed Frequency 160kHz to 700kHz
SW
≤ 6V, 4.5V ≤ V
≤ 0.93V
≤ 36V, 4V ≤ V
RJK0305DPB
RJK0301DPB
RJK0305DPB
RJK0301DPB
= 400kHz
OUT
OUT
IN
OUT
≤ 10V, 4V ≤ V
≤ 10V, 4V ≤ V
, 6.2V ≤ V
≤ 14V, 4V ≤ V
IN
OUT
IN
IN
≤ 32V, I
2.21k
2.21k
≤ 60V, 120µA I
 LINEAR TECHNOLOGY CORPORATION 2007
≤ 7V, 4.5V ≤ V
≤ 36V, 0.8V ≤ V
0.56µH
0.56µH
IN
L2
L1
≤ 100V, No R
IN
IN
OUT
≤ 36V
≤ 36V
IN
LT 0311 REV C • PRINTED IN USA
38501 TA04
≤ 60A,
≤ 36V
Q
10µF
2x
100µF
2x
IN
OUT
≤ 28V
SENSE
+
+
≤ (0.9)(V
180µF
C
330µF
2.5V
4x
OUT1
V
7V TO 14V
V
1.1V/30A
IN
OUT
IN
),
38501fc