lt3689-5 Linear Technology Corporation, lt3689-5 Datasheet - Page 32

• Manufacturer Part Number: lt3689-5
• Description: 700ma Step-down Regulator With Power-on Reset And Watchdog Timer
• Manufacturer: Linear Technology Corporation

LT3689/LT3689-5
TYPICAL APPLICATION
RELATED PARTS
PART NUMBER DESCRIPTION
LT1766
LT1936
LT1976/LT1977 60V, 1.2A (I
LT3434/LT3435 60V, 2.4A (I
LT3437
LT3480
LT3481
LT3493
LT3500
LT3505
LT3507
LT3508
LT3682
LT3684
LT3685
32
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
60V, 1.2A (I
Converter
36V, 1.4A (I
Converter
DC/DC Converter with Burst Mode Operation
DC/DC Converter with Burst Mode Operation
60V, 400mA (I
Converter with Burst Mode Operation
36V with Transient Protection to 60V, 2A (I
High Effi ciency Step-Down DC/DC Converter with Burst
Mode Operation
34V with Transient Protection to 36V, 2A (I
High Effi ciency Step-Down DC/DC Converter with Burst
Mode Operation
36V, 1.4A (I
Converter
36V, 40V
Converter and LDO Controller
36V with Transient Protection to 40V, 1.4A (I
High Effi ciency Step-Down DC/DC Converter
36V 2.5MHz, Triple (2.4A + 1.5A + 1.5A (I
Controller High Effi ciency Step-Down DC/DC Converter
36V with Transient Protection to 40V, Dual 1.4A (I
3MHz, High Effi ciency Step-Down DC/DC Converter
36V, 60V
Down DC/DC Converter
34V with Transient Protection to 36V, 2A (I
High Effi ciency Step-Down DC/DC Converter
36V with Transient Protection to 60V, 2A (I
High Effi ciency Step-Down DC/DC Converter
L1: WE-PD2: 7447745047
D1: MBRM140
C1, C2, C3: X7R OR X5R
MAX
MAX
●
OUT
OUT
OUT
OUT
OUT
FAX: [phone]
, 2A, 2.5MHz High Effi ciency Step-Down DC/DC
, 1A, 2.2MHz High Effi ciency Micropower Step-
OUT
), 200kHz, High Effi ciency Step-Down DC/DC
), 500kHz High Effi ciency Step-Down DC/DC
), 200kHz/500kHz, High Effi ciency Step-Down
), 200kHz/500kHz, High Effi ciency Step-Down
), 750kHz High Effi ciency Step-Down DC/DC
), Micropower Step-Down DC/DC
1.8V Step-Down Converter with System Reset Generated by
TRANSIENT TO 27V
C6
10nF
t
WDU
RESET
μP
●
I/O
www.linear.com
= 182ms
Watchdog Timing or Output Voltage Failure
3.6V TO 16V
WATCHDOG_DEFEAT
WINDOW TIMEOUT
V
OUT
IN
OUT
OUT
OUT
OUT
OUT
)) with LDO
C5
68nF
t
), 2.4MHz,
), 2.8MHz,
), 2.8MHz,
), 2.4MHz,
RST
), 3MHz,
= 157ms
OUT
C1
1μF
),
W/T
WDE
WDI
WDO
RST
C
C
WDT
POR
V
IN
COMMENTS
V
and TSSOP-16E Packages
V
V
Package
V
Package
V
DFN-10 and TSSOP-16E Packages
V
DFN-10 and MSOP-10E Packages
V
DFN-10 and MSOP-10E Packages
V
DFN-6 Package
V
DFN-10 Package
V
DFN-8 and MSOP-8E Packages
V
and TSSOP-16E Packages
V
QFN-24 and TSSOP-16E Packages
V
DFN-12 Package
V
DFN-10 and MSOP-10E Packages
V
DFN-10 and MSOP-10E Packages
LT3689
GND
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
: 5.5V to 60V, V
: 3.6V to 36V, V
: 3.3V to 60V, V
: 3.3V to 60V, V
: 3.3V to 60V, V
: 3.6V to 38V, V
: 3.6V to 34V, V
: 3.6V to 36V, V
: 3.6V to 36V, V
: 3.6V to 34V, V
: 3.6V to 36V, V
: 3.7V to 37V, V
: 3.6V to 36V, V
: 3.6V to 34V, V
: 3.6V to 38V, V
EN/UVLO
f
SW
SYNC
OUT
BST
= 900kHz
SW
DA
RT
FB
D1
C2
0.1μF
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
R
14.7k
T
3689 TA05
= 1.20V, I
= 1.2V, I
= 1.20V, I
= 1.20V, I
= 1.25V, I
= 0.78V, I
= 1.26V, I
= 0.8V, I
= 0.8V, I
= 0.78V, I
= 0.8V, I
= 0.8V, I
= 0.8V, I
= 1.26V, I
= 0.78V, I
15pF
C4
R2
102k
4.7μH
L1
127k
R1
Q
Q
Q
Q
Q
Q
© LINEAR TECHNOLOGY CORPORATION 2010
Q
Q
Q
Q
Q
Q
Q
Q
Q
= 1.9mA, I
= 1.9mA, I
= 2.5mA, I
= 2.5mA, I
= 4.6mA, I
= 75mA, I
= 2.5mA, I
= 100μA, I
= 100mA, I
= 100μA, I
= 70μA, I
= 50mA, I
= 2mA, I
= 850μA, I
= 70μA, I
1.8V
700mA
C3
47μF
LT 0410 REV A • PRINTED IN USA
SD
SD
SD
SD
SD
SD
SD
SD
SD
SD
SD
SD
SD
SD
SD
= 2μA, 3mm × 3mm
<1μA, 3mm × 3mm
<1μA, 3mm × 3mm
<1μA, 3mm × 3mm
<1μA, MS8E Package
<1μA, 2mm × 3mm
<10μA, 3mm × 3mm
= 10μA, TSSOP-16
= 1μA, 4mm × 4mm
<1μA, 3mm × 3mm
= 25μA, TSSOP-16
<1μA, TSSOP-16E
<1μA, 3mm × 3mm
<1μA, 3mm × 3mm
<1μA, TSSOP-16E
3689fa