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LT1610IS8#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
1
LT1610
1.7MHz, Single Cell
Micropower
DC/DC Converter
■
Uses Tiny Capacitors and Inductor
■
Internally Compensated
■
Low Quiescent Current: 30
µ
A
■
Operates with V
IN
as Low as 1V
■
3V at 30mA from a Single Cell
■
5V at 200mA from 3.3V
■
High Output Voltage Capability: Up to 28V
■
Low Shutdown Current: <1µA
■
Automatic Burst Mode
TM
Switching at Light Load
■
Low V
CESAT
Switch: 300mV at 300mA
■
8-Lead MSOP and SO Packages
The LT
®
1610 is a micropower fixed frequency DC/DC
converter that operates from an input voltage as low as 1V.
Intended for small, low power applications, it switches at
1.7MHz, allowing the use of tiny capacitors and inductors.
The device can generate 3V at 30mA from a single cell
(1V) supply. An internal compensation network can be
connected to the LT1610’s V
C
pin, eliminating two exter-
nal components. No-load quiescent current of the LT1610
is 30µA, and the internal NPN power switch handles a
300mA current with a voltage drop of 300mV.
The LT1610 is available in 8-lead MSOP and SO packages.
Burst Mode is a trademark of Linear Technology Corporation.
Figure 1. 1-Cell to 3V Step-Up Converter
Efficiency
■
Pagers
■
Cordless Phones
■
Battery Backup
■
LCD Bias
■
Portable Electronic Equipment
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
, LTC and LT are registered trademarks of Linear Technology Corporation.
C2
22µF
C1
22µF
1 CELL
L1
4.7µH
D1
V
OUT
3V
30mA
C1, C2: AVX TAJA226M006R
D1: MOTOROLA MBR0520
L1: MURATA LQH1C4R7
1610 F01
+
+
R1
1M
R2
681k
65
2
7
4
1
8
3
V
IN
SW
PGND
FB
SHDN
GNDCOMP
LT1610
V
C
LOAD CURRENT (mA)
0.1
EFFICIENCY (%)
85
80
75
70
65
60
55
50
1 10 100
1610 TA01
V
OUT
= 3V
V
IN
= 1.5V
V
IN
= 1V
V
IN
= 1.25V
2
LT1610
ABSOLUTE MAXIMUM RATINGS
W
WW
U
PACKAGE/ORDER INFORMATION
W
U
U
T
JMAX
= 125°C, θ
JA
= 160°C/W
T
JMAX
= 125°C, θ
JA
= 120°C/W
(Note 1)
V
IN
Voltage ................................................................ 8V
SW Voltage ............................................... –0.4V to 30V
FB Voltage ..................................................... V
IN
+ 0.3V
V
C
Voltage ................................................................ 2V
COMP Voltage .......................................................... 2V
Current into FB Pin .............................................. ±1mA
SHDN Voltage ............................................................ 8V
Consult factory for Military grade parts.
Maximum Junction Temperature ......................... 125°C
Operating Temperature Range (Note 1)
Commercial ............................................. 0°C to 70°C
Extended Commercial (Note 2).......... –40°C to 85°C
Industrial ........................................... –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
ORDER PART
NUMBER
LT1610CS8
LT1610IS8
S8 PART MARKING
1610
1610I
ORDER PART
NUMBER
LT1610CMS8
MS8 PART MARKING
LTDT
1
2
3
4
V
C
FB
SHDN
PGND
8
7
6
5
COMP
GND
V
IN
SW
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
1
2
3
4
8
7
6
5
TOP VIEW
V
C
FB
SHDN
PGND
COMP
GND
V
IN
SW
S8 PACKAGE
8-LEAD PLASTIC SO
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Operating Voltage 0.9 1 V
Maximum Operating Voltage 8V
Feedback Voltage ● 1.20 1.23 1.26 V
Quiescent Current V
SHDN
= 1.5V, Not Switching 30 60 µA
Quiescent Current in Shutdown V
SHDN
= 0V, V
IN
= 2V 0.01 0.5 µA
V
SHDN
= 0V, V
IN
= 5V 0.01 1.0 µA
FB Pin Bias Current ● 27 80 nA
Reference Line Regulation 1V ≤ V
IN
≤ 2V (25°C, 0°C) 0.6 1 %/V
1V ≤ V
IN
≤ 2V (70°C) 2 %/V
2V ≤ V
IN
≤ 8V (25°C, 0°C) 0.03 0.15 %/V
2V ≤ V
IN
≤ 8V (70°C) 0.2 %/V
Error Amp Transconductance ∆I = 2µA25µmhos
Error Amp Voltage Gain 100 V/V
Switching Frequency ● 1.4 1.7 2 MHz
Maximum Duty Cycle 77 80 95 %
● 75 95 %
E
LECTR
IC
AL C CHARA TERIST
ICS
The ● denotes specifications which apply over the specified temperature
range, otherwise specifications are at T
A
= 25°C. Commercial grade 0°C to 70°C, V
IN
= 1.5V, V
SHDN
= V
IN
, unless otherwise noted.
(Note 2)
3
LT1610
E
LECTR
IC
AL C CHARA TERIST
ICS
The ● denotes specifications which apply over the specified temperature
range, otherwise specifications are at T
A
= 25°C. Commercial grade 0°C to 70°C, V
IN
= 1.5V, V
SHDN
= V
IN
, unless otherwise noted.
(Note 2)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Switch Current Limit (Note 3) 450 600 900 mA
Switch V
CESAT
I
SW
= 300mA 300 350 mV
● 400 mV
Switch Leakage Current V
SW
= 5V 0.01 1 µA
SHDN Input Voltage High 1V
SHDN Input Voltage Low 0.3 V
SHDN Pin Bias Current V
SHDN
= 3V 10 µA
V
SHDN
= 0V 0.01 0.1 µA
The ● denotes specifications which apply over the specified temperature range, otherwise specifications are at T
A
= 25°C.
Industrial grade –40°C to 85°C, V
IN
= 1.5V, V
SHDN
= V
IN
, unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Operating Voltage T
A
= 85°C 0.9 1 V
T
A
= –40°C 1.25 V
Maximum Operating Voltage 8V
Feedback Voltage ● 1.20 1.23 1.26 V
Quiescent Current 30 60 µA
Quiescent Current in Shutdown V
SHDN
= 0V, V
IN
= 2V 0.01 0.5 µA
V
SHDN
= 0V, V
IN
= 5V 0.01 1.0 µA
FB Pin Bias Current ● 27 80 nA
Reference Line Regulation 2V ≤ V
IN
≤ 8V (–40°C) 0.03 0.15 %/V
2V ≤ V
IN
≤ 8V (85°C) 0.2 %/V
Error Amp Transconductance ∆I = 2µA25µmhos
Error Amp Voltage Gain 100 V/V
Switching Frequency (Note 4) ● 1.4 1.7 2 MHz
Maximum Duty Cycle (Note 4) 77 80 95 %
● 75 95 %
Switch Current Limit 450 600 900 mA
Switch V
CESAT
I
SW
= 300mA 300 350 mV
● 400 mV
Switch Leakage Current V
SW
= 5V 0.01 1 µA
SHDN Input Voltage High 1V
SHDN Input Voltage Low 0.3 V
SHDN Pin Bias Current V
SHDN
= 3V 10 µA
V
SHDN
= 0V 0.01 0.1 µA
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT1610C is guaranteed to meet specified performance from
0°C to 70°C and is designed, characterized and expected to meet these
extended temperature limits, but is not tested at –40°C and 85°C. The
LT1610I is guaranteed to meet the extended temperature limits.
Note 3: Current limit guaranteed by design and/or correlation to static test.
Current limit is affected by duty cycle due to ramp generator. See Block
Diagram.
Note 4: Not 100% tested at 85°C.
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LT1610IS8#PBF

Mfr. #:
Buy LT1610IS8#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 1.7MHz, 1x Cell uP DC/DC Conv
Lifecycle:
New from this manufacturer.
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