LTC3704 Datasheet, PDF (28/28 Pages) Linear Technology – Wide Input Range, No RSENSE Positive-to-Negative DC/DC Controller

LTC3704
TYPICAL APPLICATIO
High Efficiency Positive-to-Negative Converter
C9
1nF
OPTIONAL
R5
68.1k
1%
R_C
9.1k
C_C2
330pF
C_C1
10nF
R_T
80.6k
1%
R4
154k
1%
RUN
SENSE
I_TH
V_IN
LTC3704
NFB
FREQ
INTV_CC
GATE
MODE/SYNC GND
C_IN
47µF
16V
C_VCC
4.7µF
L1*
C_DC
22µF
25V
X7R
M1
L2*
D1
V_IN
5V TO 15V
C_OUT1
100µF
6.3V
V_OUT
–5V
5A
C_OUT2
150µF
6.3V
GND
3704 TA02
R1
1.21k
1%
R2
3.65k
1%
C_IN: TDK C5570X5R1C476M
C_OUT1: TDK C5750X5R0J107M
C_OUT2: PANASONIC EEFUE0J151R
C_DC: TDK C5750X7R1E226M
C_VCC: TDK C2012X5R0J475K
D1: FAIRCHILD MBR2035CT
L1, L2: COILTRONICS VP5-0053 (*COUPLED INDUCTORS, WITH 3
WINDINGS IN PARALLEL ON PRIMARY AND SECONDARY)
M1: INTERNATIONAL RECTIFIER IRF7822
RELATED PARTS
PART NUMBER
LT^®1175
DESCRIPTION
Negative Linear Low Dropout Regulator
LT1619
LTC1624
Current Mode PWM Controller
Current Mode DC/DC Controller
LTC1700
LTC1871
LTC1872
LT1930
LT1931
LT1964
No R_SENSE Synchronous Step-Up Controller
No R_SENSE Boost, Flyback and SEPIC Controller
SOT-23 Boost Controller
1.2MHz, SOT-23 Boost Converter
Inverting 1.2MHz, SOT-23 Converter
ThinSOT^TM Linear Low Dropout Regulator
LTC3401/LTC3402
1A/2A 3MHz Synchronous Boost Converters
ThinSOT is a trademark of Linear Technology Corporation.
COMMENTS
User-Selectable Current Limit from 200mA to 800mA,
0.4V Dropout at 500mA, 45µA Operating Current
300kHz Fixed Frequency, Boost, SEPIC, Flyback Topology
SO-8; 200kHz Operating Frequency; Buck, Boost, SEPIC Design;
V_IN Up to 36V
Up to 95% Efficiency, Operation as Low as 0.9V Input
2.5V ≤ V_IN ≤ 30V, Current Mode Control,
Programmable f_OSC from 50kHz to 1MHz
Delivers Up to 5A, 550kHz Fixed Frequency, Current Mode
Up to 34V Output, 2.6V ≤ V_IN ≤ 16V, Miniature Design
Positive-to-Negative DC/DC Conversion, Miniature Design
200mA Output Current, Low Noise, 340mV Drop Out at 200mA,
5-Lead ThinSOT
Up to 97% Efficiency, Very Small Solution, 0.5V ≤ V_IN ≤ 5V
28 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^q FAX: [phone] ^q www.linear.com
sn3704 3704fs
LT/TP 0402 2K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2001