LTC3718_15 Datasheet, PDF (20/20 Pages) Linear Technology – Low Input Voltage DC/DC Controller for DDR/QDR Memory Termination

LTC3718
TYPICAL APPLICATIO
Dual Output 2.5V, ±10A Buck Converter and 5V to 12V/130mA Boost Converter
PGOOD
R_PG
100k
C_SS
0.1µF X7R
1
24
RUN/SS BOOST
C1
3300pF
X7R
R_C 10k
C2
100pF
R_ON
237k
R_FB
249k
R_REF
499k
2
V_ON
3
PGOOD
23
TG
22
SW1
4
V_RNG
SENSE^{+ 21}
5
I_TH
SENSE^{– 20}
6
19
SGND1 PGND1
7
LTC3718
18
I_ON
BG
8
V_FB1
17
INTV_CC
9
V_REF
16
V_IN1
10
SHDN
15
V_IN2
11
14
SGND2 PGND2
R_F1
12.3k
12
V_FB2
R_F3
10k
13
SW2
R_F2
107k
C_F4
200pF X7R
D_B
CMDSH-3
C_B 0.33µF
X7R
M1
Si7440DP
D1
B340A
V_IN
6V TO 24V
C_IN1****
33µF
×2
25V
L1**
1.8µH
M2
Si7440DP
D2
B340A
+
R_F
1Ω
C_OUT*
470µF
×2
V_OUT1
2.5V
±10A
C_VCC2
4.7µF
C_F
0.1µF
C_IN2
22µF X5R
V_IN2
5V
L2***
10µH
C_VCC1
4.7µF
X5R
D3
MBR0520
*SANYO POSCAP 4TPB470M
**TOKO D104C
***PANASONIC ELJPC4R7MF
****KEMET T495X336K025AS
V_OUT2
12V
130mA
3718 TA03
RELATED PARTS
PART NUMBER
LT^®1613
LTC1735
LTC1772
LTC1773
DESCRIPTION
ThinSOT^TM Step-Up DC/DC Converter
High Efficiency Synchronous Switching Regulator
ThinSOT Current Mode Step-Down Controller
Synchronous Current Mode Step-Down Controller
LTC1778
No R_SENSE^TM Synchronous Step-Down Controller
LTC1876
LTC3413
LTC3711
LTC3713
LTC3717
2-Phase, Dual Synchronous Step-Down Controller with Step-Up Regulator
3A Monolithic DDR Memory Termination Regulator
5-Bit, Adjustable, No R_SENSE Synchronous Step-Down Controller
Low Input Voltage, High Power, No R_SENSE Synchronous Controller
High Power DDR Memory Termination Regulator
LTC3778
LTC3831
No R_SENSE Synchronous Step-Down Controller
High Power DDR Memory Termination Regulator
No R_SENSE and ThinSOT are trademarks of Linear Technology Corporation.
20 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^q FAX: [phone] ^q www.linear.com
COMMENTS
1.4MHz, 1.1V < V_IN < 10V
4V ≤ V_IN ≤ 36V, 0.8V ≤ V_OUT ≤ 6V, SSOP-16
Small Solution, 2.5V ≤ V_IN ≤ 9.8V, 0.8V ≤ V_OUT ≤ V_IN
2.65V ≤ V_IN ≤ 8.5V, 0.8V ≤ V_OUT ≤ V_IN,
550kHz Operation, > 90% Efficiency
No Sense Resistor Required, 4V ≤ V_IN ≤ 36V,
0.8V ≤ V_OUT ≤ V_IN
2.6V ≤ V_IN ≤ 36V, Dual Output: 0.8V ≤ V_OUT ≤ (0.9)V_IN
±3A Output Current, 2.25V ≤ V_IN ≤ 5.5V
0.925V ≤ V_OUT ≤ 2V, 4V ≤ V_IN ≤ 36V
No Sense Resistor Required, V_IN(MIN) = 1.5V
4V ≤ V_IN ≤ 36V, V_OUT Tracks V_IN or V_REF,
I_OUT from 1A to 20A
Optional Sense Resistor, 4V ≤ V_IN ≤ 36V,
0.6V ≤ V_OUT ≤ V_IN
V_OUT Tracks 1/2 V_IN or V_REF, 3V ≤ V_IN ≤ 8V,
I_OUT from 1A to 20A
3718fa
LT/TP 1103 1K REV A • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2002