LTC1871EMS-7 Linear Technology, LTC1871EMS-7 Datasheet - Page 32

• Manufacturer Part Number: LTC1871EMS-7
• Description: IC MULTI CONFIG SYNC ADJ 10MSOP
• Manufacturer: Linear Technology
• Type: Step-Up (Boost), Flyback, Sepicr

Specifications of LTC1871EMS-7

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.23 ~ 36 V
• Current - Output: 50mA
• Frequency - Switching: 50kHz ~ 1MHz
• Voltage - Input: 6 ~ 36 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

LTC1871-7
TYPICAL APPLICATION
RELATED PARTS
PART NUMBER
LT
LTC1624
LTC1700
LTC1871
LTC1872
LT1930
LT1931
LTC3401/LTC3402
LTC3803
LTC3806
32
®
1619
36V
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
2.2nF
47pF
C
C
3.4k
C1
C2
R
TO 72V
C
DESCRIPTION
Current Mode PWM Controller
Current Mode DC/DC Controller
No R
Wide Input Range, No R
SOT-23 Boost Controller
1.2MHz, SOT-23 Boost Converter
Inverting 1.2MHz, SOT-23 Converter
1A/2A 3MHz Synchronous Boost Converters
SOT-23 Flyback Controller
Synchronous Flyback Controller
26.7k
1%
R2
V
IN
SENSE
●
FAX: [phone]
T1: COILTRONICS VP1-0076
M1: FAIRCHILD FDC2512 (150V, 0.5Ω)
Q1: ZETEX FMMT625 (120V)
OPTIONAL
R4
110k
1%
1nF
C1
Synchronous Step-Up Controller
R3
12.4k
1%
A Small, Nonisolated 12V Flyback Telecom Housekeeping Supply
R1
604k
1%
R
120k
UV
UV
T
SENSE
+
–
= 31.8V
= 29.5V
●
www.linear.com
Controller
RUN
I
FB
FREQ
MODE/SYNC
TH
f = 200kHz
LTC1871-7
C
2.2μF
100V
X7R
IN
INTV
SENSE
GATE
GND
V
9.1V
CC
IN
100k
D1
R5
D1: ON SEMICONDUCTOR MMBZ5239BLT1 (9.1V)
D2: ON SEMICONDUCTOR MMSD4148T11
D3: INTERNATIONAL RECTIFIER 10BQ060
COMMENTS
300kHz Fixed Frequency, Boost, SEPIC, Flyback Topology
SO-8; 300kHz Operating Frequency; Buck, Boost, SEPIC Design;
V
Up to 95% Effi ciency, Operation as Low as 0.9V Input
Operation as Low as 2.5V Input, Boost Flyback,SEPIC
Delivers Up to 5A, 550kHz Fixed Frequency, Current Mode
Up to 34V Output, 2.6V ≤ V
Positive-to-Negative DC/DC Conversion, Miniature Design
Up to 97% Effi ciency, Very Small Solution, 0.5V ≤ V
Adjustable Slope Compensation, Internal Soft-Start, Current Mode
200kHz Operation
High Effi ciency, Improves Cross Regulation in Multiple Output Designs,
Current Mode, 3mm × 4mm 12-Pin DFN Package
IN
Up to 36V
Q1
R6
10Ω
C2
4.7μF
X5R
(SERIES)
C3
0.1μF
X5R
1, 2, 3
T1
M1
IN
R
0.12Ω
S
≤ 16V, Miniature Design
4, 5, 6
(PARALLEL)
D2
D3
© LINEAR TECHNOLOGY CORPORATION 2002
LT 0108 REV C • PRINTED IN USA
C
47μF
X5R
18717 TA05
OUT
IN
≤ 5V
V
12V
0.4A
OUT
18717fc