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LT1930ES5#TRMPBF

P1-P3P4-P6P7-P9P10-P12
1
LT1930/LT1930A
APPLICATIO S
U
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
1A, 1.2MHz/2.2MHz,
Step-Up DC/DC Converters
in ThinSOT
■
1.2MHz Switching Frequency (LT1930)
■
2.2MHz Switching Frequency (LT1930A)
■
Low V
CESAT
Switch: 400mV at 1A
■
High Output Voltage: Up to 34V
■
5V at 480mA from 3.3V Input (LT1930)
■
12V at 250mA from 5V Input (LT1930A)
■
Wide Input Range: 2.6V to 16V
■
Uses Small Surface Mount Components
■
Low Shutdown Current: <1µA
■
Low Profile (1mm) ThinSOT
TM
Package
■
Pin-for-Pin Compatible with the LT1613
Figure 1. 5V to 12V, 300mA Step-Up DC/DC Converter
■
TFT-LCD Bias Supply
■
Digital Cameras
■
Cordless Phones
■
Battery Backup
■
Medical Diagnostic Equipment
■
Local 5V or 12V Supply
■
External Modems
■
PC Cards
■
xDSL Power Supply
Efficiency
The LT
®
1930 and LT1930A
are the industry’s highest
power SOT-23 switching regulators. Both include an
internal 1A, 36V switch allowing high current outputs to be
generated in a small footprint. The LT1930 switches at
1.2MHz, allowing the use of tiny, low cost and low height
capacitors and inductors. The faster LT1930A switches at
2.2MHz, enabling further reductions in inductor size.
Complete regulator solutions approaching one tenth of a
square inch in area are achievable with these devices.
Multiple output power supplies can now use a separate
regulator for each output voltage, replacing cumbersome
quasi-regulated approaches using a single regulator and
custom transformers.
A constant frequency internally compensated current mode
PWM architecture results in low, predictable output noise
that is easy to filter. Low ESR ceramic capacitors can be
used at the output, further reducing noise to the millivolt
level. The high voltage switch on the LT1930/LT1930A is
rated at 36V, making the device ideal for boost converters
up to 34V as well as for single-ended primary inductance
converter (SEPIC) and flyback designs. The LT1930 can
generate 5V at up to 480mA from a 3.3V supply or 5V at
300mA from four alkaline cells in a SEPIC design.
The LT1930/LT1930A are available in the 5-lead ThinSOT
package.
GND
V
IN
SW
SHDN FB
V
IN
5V
4
51
3
D1
L1
10µH
2
R1
113k
LT1930
1930/A F01
C2
4.7µF
C3*
10pF
C1
2.2µF
R2
13.3k
V
OUT
12V
300mA
C1: TAIYO-YUDEN X5R LMK212BJ225MG
C2: TAIYO-YUDEN X5R EMK316BJ475ML
D1: ON SEMICONDUCTOR MBR0520
L1: SUMIDA CR43-100
*OPTIONAL
SHDN
LOAD CURRENT (mA)
0
EFFICIENCY (%)
70
75
80
400
1930 TA01
65
60
50
100
200
300
55
90
85
V
IN
= 5V
V
IN
= 3.3V
, LTC and LT are registered trademarks of Linear Technology Corporation
ThinSOT is a trademark of Linear Technology Corporation.
2
LT1930/LT1930A
(Note 1)
V
IN
Voltage .............................................................. 16V
SW Voltage ................................................–0.4V to 36V
FB Voltage .............................................................. 2.5V
Current Into FB Pin .............................................. ±1mA
SHDN Voltage ......................................................... 10V
Maximum Junction Temperature ......................... 125°C
Operating Temperature Range (Note 2) .. –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T
A
= 25°C.
V
IN
= 3V, V
SHDN
= V
IN
unless otherwise noted. (Note 2)
ORDER PART
NUMBER
LT1930ES5
LT1930AES5
S5 PART MARKING
LTKS
LTSQ
T
JMAX
= 125°C, θ
JA
= 256°C/W
ELECTRICAL CHARACTERISTICS
PACKAGE/ORDER I FOR ATIO
UU
W
ABSOLUTE AXI U RATI GS
WWWU
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT1930E/LT1930AE are guaranteed to meet performance
specifications from 0°C to 70°C. Specifications over the –40°C to 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3: Current limit guaranteed by design and/or correlation to static test.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
SW 1
GND 2
TOP VIEW
S5 PACKAGE
5-LEAD PLASTIC SOT-23
FB 3
5 V
IN
4 SHDN
LT1930 LT1930A
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Minimum Operating Voltage 2.45 2.6 2.45 2.6 V
Maximum Operating Voltage 16 16 V
Feedback Voltage 1.240 1.255 1.270 1.240 1.255 1.270 V
● 1.230 1.280 1.230 1.280 V
FB Pin Bias Current V
FB
= 1.255V ● 120 360 240 720 nA
Quiescent Current V
SHDN
= 2.4V, Not Switching 4.2 6 5.5 8 mA
Quiescent Current in Shutdown V
SHDN
= 0V, V
IN
= 3V 0.01 1 0.01 1 µA
Reference Line Regulation 2.6V ≤ V
IN
≤ 16V 0.01 0.05 0.01 0.05 %/V
Switching Frequency 1 1.2 1.4 1.8 2.2 2.6 MHz
● 0.85 1.6 1.6 2.9 MHz
Maximum Duty Cycle ● 84 90 75 90 %
Switch Current Limit (Note 3) 1 1.2 2 1 1.2 2.5 A
Switch V
CESAT
I
SW
= 1A 400 600 400 600 mV
Switch Leakage Current V
SW
= 5V 0.01 1 0.01 1 µA
SHDN Input Voltage High 2.4 2.4 V
SHDN Input Voltage Low 0.5 0.5 V
SHDN Pin Bias Current V
SHDN
= 3V 16 32 35 70 µA
V
SHDN
= 0V 0 0.1 0 0.1 µA
3
LT1930/LT1930A
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Quiescent Current FB Pin Voltage SHDN Pin Current
Current Limit
Switch Saturation Voltage
Oscillator Frequency
SW (Pin 1): Switch Pin. Connect inductor/diode here.
Minimize trace area at this pin to reduce EMI.
GND (Pin 2): Ground. Tie directly to local ground plane.
FB (Pin 3): Feedback Pin. Reference voltage is 1.255V.
Connect resistive divider tap here. Minimize trace area at
FB. Set V
OUT
according to V
OUT
= 1.255V(1 + R1/R2).
UU
U
PI FU CTIO S
SHDN (Pin 4): Shutdown Pin. Tie to 2.4V or more to enable
device. Ground to shut down.
V
IN
(Pin 5): Input Supply Pin. Must be locally bypassed.
TEMPERATURE (°C)
–50 –25
QUIESCENT CURRENT (mA)
50 75
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
1930/A G01
0 25 100
NOT SWITCHING
LT1930A
LT1930
TEMPERATURE (°C)
–50
1.22
FB VOLTAGE (V)
1.23
1.24
1.25
1.26
1.28
–25
02550
1930/A G02
75 100
1.27
SHDN PIN VOLTAGE (V)
0
SHDN PIN CURRENT (µA)
20
30
40
3
5
1930/A G03
10
0
–10
12 4
50
60
70
80
90
6
LT1930A
LT1930
DUTY CYCLE (%)
10
CURRENT LI MIT (A)
0.8
1.2
1930/A G04
0.4
0
3020 5040 7060 9080
1.6
0.6
1.0
0.2
1.4
SWITCH CURRENT (A)
0
0
V
CESAT
(V)
0.05
0.15
0.20
0.25
0.8
0.45
1930/A G05
0.10
0.4 1.2
0.6
0.2 1.0
0.30
0.35
0.40
TEMPERATURE (°C)
–50 –25 0
FREQUENCY (MHz)
2.5
2.3
2.1
1.9
1.7
1.5
1.3
1.1
0.9
0.7
0.5
25 50 75 100
1930/A G06
LT1930
LT1930A
P1-P3P4-P6P7-P9P10-P12

LT1930ES5#TRMPBF

Mfr. #:
Buy LT1930ES5#TRMPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 1.2MHz Boost Conv. in 5-lead SOT-23
Lifecycle:
New from this manufacturer.
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