LTC1778EGN Linear Technology, LTC1778EGN Datasheet - Page 24

• Manufacturer Part Number: LTC1778EGN
• Description: IC CONTROLLR STP-DWN SYNC 16SSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC1778EGN

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Current - Output: 2A
• Voltage - Input: 4 ~ 36 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Voltage - Output: -
• Power - Output: -
• Frequency - Switching: -

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TYPICAL APPLICATIO
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LT
Burst Mode is a registered trademark of Linear Technology Corporation.
24
®
3800
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
470pF
11.5k
C
R1
C1
24.9k
DESCRIPTION
550kHz Step-Down Controller
No R
Dual, 2-Phase Synchronous Step-Down Controller
Dual, 2-Phase Synchronous Step-Down Controller
High Efficiency, 2-Phase Synchronous Step-Down Controller
with 5-Bit VID
High Efficiency, 2-Phase Synchronous Step-Down Controller
High Efficiency, Synchronous Step-Down Controller
High Efficiency, Synchronous Step-Down Controller with 5-Bit VID
SOT-23 Step-Down Controller
Synchronous Step-Down Controller
2-Phase, Dual Synchronous Step-Down Controller with
Step-Up Regulator
Low V
Low V
60V Synchronous Step-Down Controller
R2
C
C
L1: TOKO A921CY-1R0M
IN
OUT
●
: TAIYO YUDEN TMK432BJ106MM
SENSE
FAX: [phone]
33k
: CORNELL DUBILIER ESRD121M04B
0.1µF
R
2200pF
IN
OUT
C
C
SS
100pF
High Current Synchronous Step-Down Controller
, No R
C2
C
Current Mode Synchronous Step-Down Controller
C2
SENSE
220k
100k
R
R
ON
PG
U
Synchronous Step-Down Controller
1
2
3
4
5
6
7
8
●
RUN/SS
PGOOD
V
FCB
I
SGND
I
V
TH
ON
RNG
FB
www.linear.com
LTC1778
Typical Application 2.5V/3A at 1.4MHz
EXTV
INTV
BOOST
PGND
SW
V
TG
BG
CC
CC
IN
16
15
14
13
12
11
10
9
C
0.22µF
CMDSH-3
B
C
4.7µF
C
0.1µF
1Ω
RF
VCC
F
D
B
COMMENTS
8-Pin MSOP; Synchronizable; Soft-Start; Current Mode
97% Efficiency; No Sense Resistor; 16-Pin SSOP
Power Good Output; Minimum Input/Output Capacitors;
3.5V ≤ V
Synchronizable 150kHz to 300kHz
Up to 42A Output; 0.925V ≤ V
Up to 42A Output; VRM 8.4; 1.3V ≤ V
Burst Mode
3.5V ≤ V
Mobile VID; 0.925V ≤ V
Current Mode; 550kHz; Very Small Solution Size
Up to 95% Efficiency, 550kHz, 2.65V ≤ V
0.8V ≤ V
3.5V ≤ V
1.5V ≤ V
0.6V ≤ V
Current Mode, Output Slew Rate Control
M1
1/2 Si9802
M2
1/2 Si9802
IN
IN
OUT
IN
IN
OUT
L1, 1µH
≤ 36V
≤ 36V
≤ 36V, Power Good Output, 300kHz Operation
≤ 36V, 0.8V ≤ V
®
≤ V
≤ (0.9)V
Operation; 16-Pin Narrow SSOP;
IN
, Synchronizable to 750kHz
IN
, 4V ≤ V
OUT
© LINEAR TECHNOLOGY CORPORATION 2001
+
OUT
≤ 2V; 3.5V ≤ V
OUT
IN
≤ (0.9)V
C
10µF
25V
C
120µF
4V
1778 TA03
LT/LT 0405 REV B • PRINTED IN USA
IN
OUT
≤ 36V, I
≤ 2V
V
9V TO 18V
V
2.5V
3A
OUT
IN
OUT
IN
IN
, I
OUT
≤ 3.5V
IN
≤ 8.5V,
OUT
≤ 36V
Up to 20A
Up to 20A
1778fb