LT1301IN8#PBF [Linear]
LT1301 - Micropower High Efficiency 5V/12V Step-Up DC/DC Converter for Flash Memory; Package: PDIP; Pins: 8; Temperature Range: -40°C to 85°C;型号: | LT1301IN8#PBF |
厂家: | Linear |
描述: | LT1301 - Micropower High Efficiency 5V/12V Step-Up DC/DC Converter for Flash Memory; Package: PDIP; Pins: 8; Temperature Range: -40°C to 85°C 开关 光电二极管 |
文件: | 总12页 (文件大小:255K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
LT1301
Micropower High Efficiency
5V/12V Step-Up DC/DC
Converter for Flash Memory
U
DESCRIPTION
FEATURES
■
12V at 120mA from 5V or 3.3V Supply
TheLT1301isamicropowerstep-upDC/DCconverterthat
utilizes Burst Mode™ operation. The device can deliver 5V
or 12V from a two-cell battery input. It features program-
mable 5V or 12V output via a logic-controlled input, no-
loadquiescentcurrentof120µAandashutdownpinwhich
reducessupplycurrentto10µA.Theon-chippowerswitch
has a low 170mV saturation voltage at a switch current of
1A, a four-fold reduction over prior designs. A 155kHz
internal oscillator allows the use of extremely small sur-
facemountinductorsandcapacitors.Operationisguaran-
teedat1.8Vinput. Thisallowsmoreenergytobeextracted
fromthebattery, increasingoperatinglife. TheILIM pincan
be used for soft start or to program peak switch current
with a single resistor allowing the use of even smaller
inductors in lighter load applications. The LT1301 is
available in an 8-lead SOIC package, minimizing board
space requirements. For a selectable 3.3V/5V step-up
converter, please see the LT1300. For higher output
power, see the LT1302.
■
Supply Voltage as Low as 1.8V
■
Better High Current Efficiency Than CMOS
Up to 89% Efficiency
120µA Quiescent Current
■
■
■
Shutdown to 10µA
■
Programmable 5V or 12V Output
■
Low VCESAT Switch: 170mV at 1A Typical
■
ILIM Pin Programs Peak Switch Current
■
Uses Inexpensive Surface Mount Inductors
■
8-Lead DIP or SOIC Package
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APPLICATIONS
■
Flash Memory VPP Generator
■
Palmtop Computers
■
Portable Instruments
■
Bar-Code Scanners
■
Personal Digital Assistants
PCMCIA Cards
■
Burst Mode is a trademark of Linear Technology Corporation.
U
TYPICAL APPLICATIONS N
L1
Output Voltage
Efficiency
D1
33µH
5V
OR
3.3V
12V
OUTPUT
90
88
86
12V
VOUT
2V/DIV
V
IN
= 5V
SW
V
IN
SELECT
SENSE
V
IN
= 3.3V
+
84
82
80
78
76
74
72
0
C1
LT1301
47µF
C2
33µF
20V
+
0.1µF*
SHDN
PGND
I
N/C
SHUTDOWN
LIM
GND
SHUTDOWN
10V/DIV
1ms/DIV
LT1301 TAO1
*REQUIRED FOR 5V OUTPUT
V
IN = 5V, VOUT = 12V
LT1301 F1
LOAD = 100Ω
L1 = COILCRAFT DO3316-333
OR SUMIDA CD73-330KC
D1 = 1N5817 OR MOTOROLA
MBRS130LT3
1
10
LOAD CURRENT (mA)
100
300
C1 = AVX TPSD476M016R0100
OR SANYO OS-CON 165A47M
C2 = AVX TPSD336M020R0100
OR SANYO OS-CON 205A33M
LT1301 TA2
LT1300 F2
Figure 1. 3.3V/5V to 12V Step-Up Converter
1
LT1301
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ABSOLUTE MAXIMUM RATINGS
PACKAGE/ORDER INFORMATION
VIN Voltage .............................................................. 10V
SW1 Voltage ............................................................ 20V
Sense Voltage .......................................................... 20V
Shutdown Voltage ................................................... 10V
Select Voltage .......................................................... 10V
ORDER PART
TOP VIEW
NUMBER
GND
SEL
1
2
3
4
PGND
SW
8
7
6
5
LT1301CN8
LT1301CS8
LT1301IS8
SHDN
SENSE
V
IN
I
LIM
ILIM Voltage ............................................................ 0.5V
Maximum Power Dissipation ............................. 500mW
Operating Temperature Range
N8 PACKAGE
8-LEAD PLASTIC DIP
S8 PACKAGE
8-LEAD PLASTIC SOIC
S8 PART MARKING
LT1301C................................................... 0°C to 70°C
LT1301I .................................................. 40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
TJMAX = 100°C, θJA = 150°C/ W
1301
1301I
ELECTRICAL CHARACTERISTICS TA = 25°C, VIN = 2V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
I
Quiescent Current
V
V
= 0.5V, V = 5V, V = 5.5V
SENSE
= 1.8V
●
●
120
7
200
15
µA
µA
Q
SHDN
SHDN
SEL
V
V
Input Voltage Range
Output Sense Voltage
1.8
2.0
V
V
V
V
IN
●
V
V
= 5V
= 0V
●
●
11.52 12.00 12.48
4.75
OUT
SEL
SEL
5.00
5.25
Output Referred
Comparator Hysteresis
V
V
= 5V (Note 1)
= 0V (Note 1)
●
●
50
22
100
50
mV
mV
SEL
SEL
Oscillator Frequency
Oscillator TC
Maximum Duty Cycle
Switch On-Time
Current Limit not Asserted.
120
75
155
0.2
86
185
kHz
%/°C
%
DC
95
t
Current Limit not Asserted.
5.6
µs
ON
Output Line Regulation
Switch Saturation Voltage
Switch Leakage Current
1.8V < V < 6V
●
●
●
0.06
130
0.1
0.15
200
10
%/V
mV
µA
IN
V
I
= 700mA
SW
CESAT
V
= 5V, Switch Off
SW
Peak Switch Current
(Internal Trip Point)
Shutdown Pin High
Shutdown Pin Low
Select Pin High
I
I
Floating (See Typical Application)
Grounded
0.75
1.8
1.0
0.4
1.25
A
A
V
V
V
V
µA
µA
µA
LIM
LIM
V
V
V
V
●
SHDNH
SHDNL
SELH
0.5
●
●
1.5
Select Pin Low
Shutdown Pin Bias Current
0.8
20
SELL
I
V
V
V
= 5V
= 2V
= 0V
●
●
●
8
3
0.1
SHDN
SHDN
SHDN
SHDN
1
3
I
Select Pin Bias Current
0V < V
< 5V
●
1
µA
SEL
SEL
Note 1: Hysteresis specified is DC. Output ripple may be higher if
output capacitance is insufficient or capacitor ESR is excessive.
See operation section.
The
● denotes specifications which apply over the 0°C to 70°C
temperature range.
2
LT1301
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TYPICAL PERFORMANCE CHARACTERISTICS
Total Quiescent Current
in Shutdown
Shutdown Pin Bias Current
5V Output Efficiency
20
18
16
14
12
10
8
90
88
86
84
80
70
60
50
40
30
20
10
0
T = 25°C
A
T
= 25°C
A
V
= 3.3V
IN
V
= 2.5V
IN
82
80
78
76
74
72
70
6
4
2
0
4
5
0
1
2
3
6
7
8
7
1
10
100
1000
0
4
6
1
2
3
5
8
SHUTDOWN VOLTAGE (V)
INPUT VOLTAGE (V)
LOAD CURRENT (mA)
LT1301 G1
LT1301 G2
LT1300 G3
Load Transient Response of
Figure 1 Circuit
Saturation Voltage vs Switch Current
No-Load Input Current
250
225
500
450
400
350
T
A
= 25°C
VOUT
100mV/DIV
AC COUPLED
200
175
150
125
100
75
V
OUT
= 12V
120mA
ILOAD
300
250
0mA
200µs/DIV
LT1301 G6
VIN = 5V
200
150
100
50
V
= 5V
3
OUT
25
0
4
6
2
7
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
SWITCH CURRENT (A)
1
5
INPUT VOLTAGE (V)
LT1301 G5
LT1301 G4
Load Transient Response of
Figure 1 Circuit
Select Pin Transient Response
Select Pin Transient Response
12V
12V
VOUT
100mV/DIV
AC COUPLED
VOUT
2V/DIV
VOUT
2V/DIV
5V
5V
120mA
ILOAD
VSELECT
10V/DIV
VSELECT
10V/DIV
0mA
200µs/DIV
5ms/DIV
COUT = 100µF, VIN = 5V
100Ω LOAD
5ms/DIV
LT1301 G9
LT1301 G7
LT1301 G8
VIN = 3.3V
COUT = 100µF, VIN = 3.3V
100Ω LOAD
3
LT1301
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PIN FUNCTIONS
GND (Pin 1): Signal Ground. Tie to PGND under the
package.
for approximately 400mA. A resistor between ILIM and
ground sets peak current to some intermediate value .
Sel (Pin 2): Output Select. When tied to VIN converter
regulates at 12V. When grounded or floating converter
regulates at 5V. May be driven under logic control.
VIN (Pin 6): Supply Pin. Must be bypassed with a large
valueelectrolytictoground. Keepbypasswithin0.2"ofthe
device.
SHDN (Pin 3): Shutdown. Pull high to shut down the
SW (Pin 7): Switch Pin. Connect inductor and diode here.
Keep layout short and direct to minimize radio frequency
interference.
LT1301. Ground for normal operation.
Sense (Pin 4): “Output” Pin. Goes to internal resistive
divider. If operating at 5V output, a 0.1µF ceramic capaci-
tor is required from Sense to Ground.
PGND (Pin 8): Power Ground. Tie to signal ground (pin 1)
under the package. Bypass capacitor from VIN should be
tied directly to PGND within 0.2" of the device.
ILIM (Pin5):Floatfor1Aswitchcurrentlimit. Tietoground
W
BLOCK DIAGRAM
D1
V
L1
IN
V
OUT
+
+
C2
C1
V
IN
SW
SENSE
4
2
7
18mV
A2 CURRENT
COMPARATOR
R1
3Ω
+
–
R2
730Ω
500k
A1
OFF
COMPARATOR
+
–
1.25V
REFERENCE
ENABLE OSCILLATOR
155kHZ
Q1
160×
A3 DRIVER
BIAS
Q2
1×
97.5k
69.2k
Q3
8.5k
SHUTDOWN
3
GND
SELECT
PGND
8
I
LIM
1
2
5
LT1301 F2
Figure 2.
4
LT1301
5V
TEST CIRCUITS
2V
100Ω
V
IN
I
L
f
SEL
SW
OUT
100µF
LT1301
SHDN
PGND
SENSE
GND
LT1301 TC
Oscillator Test Circuit
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OPERATION
the voltage across 3Ω resistor R1 which is directly related
to the switch current. Q2’s collector current is set by the
emitter-area ratio to 0.6% of Q1’s collector current. When
R1’s voltage drop exceeds 18mV, corresponding to 1A
switch current, A2’s output goes high, truncating the on-
time portion of the oscillator cycle and increasing off-time
to about 2µs as shown in Figure 3, trace A. This pro-
grammedpeakcurrentcanbereducedbytyingtheILIM pin
to ground, causing 15µA to flow through R2 into Q3’s
collector. Q3’scurrentcausesa10.4mVdropinR2sothat
only an additional 7.6mV is required across R1 to turn off
the switch. This corresponds to a 400mA switch current
as shown in Figure 3, trace B. The reduced peak switch
current reduces I2R loses in Q1, L1, C1 and D1. Efficiency
can be increased by doing this provided that the accom-
panying reduction in full load current is acceptable. Lower
peak currents also extend alkaline battery life due to the
alkaline cell’s high internal impedance.
OperationoftheLT1301isbestunderstoodbyreferringto
the Block Diagram in Figure 2. When A1’s negative input,
related to the Sense pin voltage by the appropriate resis-
tor-divider ratio is higher that the 1.25V reference voltage,
A1’s output is low. A2, A3 and the oscillator are turned off,
drawing no current. Only the reference and A1 consume
current, typically 120µA. When A1’s negative input drops
below 1.25V, overcoming A1’s 6mV hysteresis, A1’s out-
put goes high enabling the oscillator, current comparator
A2, and driver A3. Quiescent current increases to 2mA as
the device prepares for high current switching. Q1 then
turns on in controlled saturation for (nominally) 5.3µs or
until comparator A2 trips, whichever comes first. After a
fixed off-time of (nominally) 1.2µs, Q1 turns on again. The
LT1301’s switching causes current to alternately build up
inL1anddumpintooutputcapacitorC2viaD1, increasing
the output voltage. When the output is high enough to
cause A1’s output to go to low, switching action ceases.
C2 is left to supply current to the load until VOUT decreases
enough to force A1’s output high, and the entire cycle
repeats. Figure 4 details relevant waveforms. A1’s cycling
causeslow-to-mid-frequencyripplevoltageontheoutput.
Ripple can be reduced by making the output capacitor
large. The 33µF unit specified results in ripple of 100mV to
200mVonthe12Voutput. A100µFcapacitorwilldecrease
ripple to 50mV. If operating at 5V ouput a 0.1µF ceramic
capacitor is required at the Sense pin in addition to the
electrolytic.
TRACE A
500mA/DIV
ILIM PIN
OPEN
TRACE B
500mA/DIV
ILIM PIN
GROUNDED
20µs/DIV
Figure 3. Switch Pin Current With ILIM Floating or Grounded
Ifswitchcurrentreaches1A, causingA2totrip, switchon-
timeisreducedandoff-timeincreasesslightly.Thisallows
continuous mode operation during bursts. A2 monitors
5
LT1301
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APPLICATIONS INFORMATION
VOUT
100mV/DIV
AC COUPLED
VOUT
5V/DIV
VSW
10V/DIV
IIN
500mA/DIV
VSHDN
10V/DIV
IL
500mA/DIV
LT1300 F4
20µs/DIV
200µs/DIV
LT1300 F5
V
IN = 5V, VOUT = 12V
VIN = 5V, VOUT = 12V, L = 33µH
C
OUT = 33µF, ILOAD = 90mA
Figure 5. Start-Up Response
Figure 4. Burst Mode Operation in Action
D1
1N5817
L1
33µH
Output Voltage Selection
V
IN
3.3V OR 5V
The LT1301 can be selected to 5V or 12V under logic
control or fixed at either by tying Select to ground or VIN
respectively. It is permissible to tie Select to a voltage
higher than VIN as long as it does not exceed 10V.
Efficiency in 5V mode will be slightly less that in 12V mode
due to the fact that the diode drop is a greater percentage
of5Vthan12V. SincethebipolarswitchintheLT1301gets
its base drive from VIN, no reduction in switch efficiency
occurs when in 5V mode. When VIN exceeds the pro-
grammed output voltage the output will follow the input.
This is characteristic of the simple step-up or “boost”
converter topology. A circuit example that provides a
regulated output with an input voltage above or below the
output (known as a buck-boost or SEPIC) is shown in the
Typical Applications section.
SW
V
IN
SELECT
SENSE
12V
+
47µF
LT1301
+
C2
33µF
SHDN
GND
SHUTDOWN
I
LIM
PGND
R1
1M
C3
0.1µF
LT1301 F6
Figure 6.
VOUT
5VDIV
IIN
500mA/DIV
Shutdown
VSHDN
10V/DIV
The converter can be turned off by pulling SHDN (pin 3)
high. Quiescent current drops to 10µA in this condition.
Biascurrentof8µAto10µAflowsintothepin(at5V input).
It is recommended that SHDN not be left floating. Tie the
pintogroundifthefeatureisnotused.SHDNcanbedriven
high even if VIN is floating.
200µs/DIV
LT1300 F5
VIN = 5V, VOUT = 12V
Figure 7. Startup Response Soft-Start Circuitry Added
adding R1 and C3 as shown in Figure 6, the switch
current in the LT1301 is initially limited to 400mA until
the 15µA flowing out of the ILIM pin charges up C3. Input
current is held to under 500mA while the output voltage
ramps up to 12V as shown in Figure 7. R1 provides a
discharge path for the capacitor without appreciably de-
creasingpeakswitchcurrent. WhenusingtheILIM pinsoft-
start mode a minimum load of a few hundred microam-
peres is recommended to prevent C3 from discharging, as
no current flows out of ILIM when the LT1301 is not
ILIM Function
The LT1301’s current limit (ILIM) pin can be used for soft
start. Upon start-up, the LT1301 will draw maximum
current from the supply (about 1A) from the supply to
charge the output capacitor. Figure 5 shows VOUT and IIN
waveforms as the device is turned on. The high current
flow can create IR drops along supply and ground lines
or cause the input supply to drop out momentarily. By
6
LT1301
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APPLICATIONS INFORMATION
Table 1. Recommended Inductors
EFFICIENCY (%)
30mA 60mA 120mA
COMPONENT
HEIGHT (mm)
PART NUMBER
VENDOR
L (µ
H) DCR (Ω) V (V)
I
PIN
LIM
PHONE NUMBER
IN
DO3316-333
Coilcraft
33
0.088
3.3
Open
Open
Open
Ground
10k
Ground
Open
Open
Open
Open
84
89
82
85
86
88
78
84
88
86
89
81
85
84
88
80
85
84
83
84
89
82
—
87
—
—
84
88
86
89
—
—
85
88
80
—
84
—
85
90
—
—
—
—
—
—
89
87
90
—
—
86
89
81
—
85
—
5.5
(708) 639–6400
5
3.3
3.3
5
5
2
3.3
5
3.3
5
3.3
5
3.3
5
DO1608-223
Coilcraft
22
.31
3.5
DO1608-103
CTX20-1
Coilcraft
Coiltronics
10
20
.11
.175
3.5
4.2
(407) 241-7876
(716) 532-2234
(404) 436-1300
(708) 956-0666
GA10-332
Gowanda
33
22
33
33
.077
0.7
Through-Hole
Open
LQH3G220K04M00 Murata-Erie
Ground
Ground
Open
Open
Open
Ground
Open
Ground
2.0
3.5
3.0
CD73-330KC
Sumida
Sumida
0.131
0.48
CDRH62-330MC
3.3
5
Table 2. Recommended Capacitors
switching. Zero load current causes the LT1301 to switch
so infrequently that C3 can completely discharge reducing
subsequent peak switch current to 400mA. If a load is
suddenly applied, output voltage will sag until C3 can be
recharged and peak switch current returns to 1A.
VENDOR
AVX
SERIES
TPS
TYPE
PHONE#
Surface Mount
Through-Hole
Through-Hole
(803)448–9411
(619) 661–6835
(201) 348-5200
Sanyo
Panasonic
OS-CON
HFQ
If the full capacity of the LT1301 is not required peak
current can be reduced by changing the value of R3 as
shown in Figure 8. With R3 = 0 switch current is limited to
approximately 400mA. Smaller, less expensive inductors
with lower saturation ratings can then be used.
1100
1000
900
800
700
600
500
400
300
1.6V ≤ V ≤ 5V
IN
Inductor Selection
For full output power, the inductor should have a satura-
tion current rating of 1.25A for worst-case current limit,
although it is acceptable to bias an inductor 20% or more
into saturation. Smaller inductors can be used in conjunc-
tion with the ILIM pin. Efficiency is significantly affected by
inductor DCR. For best efficiency limit the DCR to 0.03Ω
or less. Toroidal types are preferred in some cases due to
their inherent flux containment and EMI/RFI superiority.
Recommended inductors are listed in Table 1.
100
1k
10k
100k
1M
CURRENT LIMIT SET RESISTOR (Ω)
LT1301 F8
Figure 8. Peak Switch Current vs. Current Limit Set Resistor
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LT1301
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APPLICATIONS INFORMATION
Capacitor Selection
Diode Selection
LowESRcapacitorsarerequiredforbothinputandoutput
of the LT1301. ESR directly affects ripple voltage and
efficiency.ForsurfacemountapplicationsAVXTPSseries
tantalum capacitors are recommended. These have been
speciallydesignedforSMPSandhavelowESRalongwith
high surge current ratings. For through-hole applications
Sanyo OS-CON capacitors offer extremely low ESR in a
small size. Again, if peak switch current is reduced using
the ILIM pin, capacitor requirements can be relaxed and
smaller, higher ESR units can be used. Suggested capaci-
tor sources are listed in Table 2.
Best performance is obtained with a Schottky rectifier
diode such as the 1N5817. Phillips Components makes
this in surface mount as the PRLL5817. Motorola makes
the MBRS130LT3 which is slightly better and also in
surface mount. For lower output power a 1N4148 can be
used although efficiency will suffer substantially.
Layout Considerations
The LT1301 is a high speed, high current device. The input
capacitor must be no more than 0.2˝ from VIN (pin 6) and
ground. Connect the PGND and GND (pins 8 and 1)
together under the package. Place the inductor adjacent to
SW (pin 7) and make the switch pin trace as short as
possible. This keeps radiated noise to a minimum.
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TYPICAL APPLICATIONS N
Four-Cell to 5V Converter
C2
100µF
+
L1
33µH
1N5817
5V OUTPUT
SW
V
IN
200mA
I
SENSE
NC
LIM
80 to 83% EFFICIENT
+
AT I
> 10mA
C1
100µF
LOAD
LT1301
4 CELLS
0.1µF
+
C3
100µF
L2
33µH
SHDN
GND
SELECT
PGND
SHUTDOWN
LT1301 TAO3
Step-Up Converter with Automatic Output Disconnect
470Ω
L1*
2N4403
1N5817
10µH
5V, 200mA
NC
+
SELECT
SHDN
V
IN
2×
100µF
AA
SHUTDOWN
100µF
SW
CELL
+
LT1301
I
NC
SENSE
PGND
LIM
GND
0.1µF
*SUMIDA CD54-100LC
COILCRAFT DO3316-223
LT1301 TA4
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LT1301
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TYPICAL APPLICATIONS N
LCD Contrast Supply
CONTRAST
–4V TO –29V 12mA
MAXIMUM FROM 1.8V SUPPLY
(77% EFFICIENT)
20mA MAXIMUM FROM
3V SUPPLY (83% EFFICIENT)
V
OUT
V
IN
T1
4
1.8V TO 6V
7
3
1
22µF
35V
150K
+
8
2
10
9
1N5819
V
IN
SW
SHUTDOWN
SHDN
NC SENSE
+
LT1301
100µF
NC
I
SELECT
LIM
PGND
GND
12K
12K
+
T1 = DALE LPE-5047-AO45 (605) 665-9301
2.2µF
PWM IN
0% TO 100%
CMOS DRIVE 0V TO 5V
LT1300 TA5
Low-Voltage CCFL Power Supply
9
3
7
22pF
3kV
TI
5
1
4
2
V
IN
2V - 6V
1Ω
0.068µF
120Ω
1N5817
L1
CCFL
ZTX849
ZTX849
WIMA
MKP20
V
SELECT
47µH
IN
SW
SENSE
NC
+
LT1301
10µF
0.1µF
2N3904
SHDN
GND
I
LIM
PGND
+
7.5K
1%
1N4148
1µF
SHUTDOWN
0 - 5V IN
DC
LT1300 TA6
INTENSITY ADJUST
100µA TO 2mA BULB CURRENT
T1 = COILTRONICS CTX110654-1
L1 = COILCRAFT D03316-473
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LT1301
U
TYPICAL APPLICATIONS N
5V to –5V Converter
L1
33µH
–V
300mA
5V
OUT
5V
2
3
4
33µF
+
1N965
1N5817
1
1N4148
+
33µF
V
SW
SHDN
IN
SELECT
NC
NC
SHUTDOWN
LT1301
OR
LT1300
4.99K
1%
0.1µF
SENSE
GND
I
LIM
PGND
4.99K
1%
LT1301 TA7
5V
L1 = COILTRONICS CTX33-4
10
LT1301
U
Dimensions in inches (millimeters) unless otherwise noted.
PACKAGE DESCRIPTION
N8 Package
8-Lead Plastic DIP
0.400
(10.160)
MAX
0.130 ± 0.005
(3.302 ± 0.127)
0.300 – 0.320
(7.620 – 8.128)
0.045 – 0.065
(1.143 – 1.651)
8
1
7
6
5
4
0.065
(1.651)
TYP
0.250 ± 0.010
(6.350 ± 0.254)
0.009 – 0.015
(0.229 – 0.381)
0.125
0.020
(0.508)
MIN
(3.175)
MIN
+0.025
–0.015
0.045 ± 0.015
(1.143 ± 0.381)
2
3
0.325
+0.635
8.255
(
)
–0.381
0.100 ± 0.010
(2.540 ± 0.254)
0.018 ± 0.003
(0.457 ± 0.076)
N8 0392
S8 Package
8-Lead Plastic S0IC
0.189 – 0.197*
(4.801 – 5.004)
0.010 – 0.020
(0.254 – 0.508)
7
5
8
6
× 45°
0.053 – 0.069
(1.346 – 1.752)
0.004 – 0.010
0.008 – 0.010
(0.203 – 0.254)
(0.101 – 0.254)
0°– 8° TYP
0.150 – 0.
(3.810 – 3.
0.228 – 0.244
(5.791 – 6.197)
0.016 – 0.050
0.406 – 1.270
0.050
(1.270)
BSC
0.014 – 0.019
(0.355 – 0.483)
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006 INCH (0.15mm).
1
2
3
4
SO8 0294
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
11
LT1301
U.S. Area Sales Offices
SOUTHWEST REGION
Linear Technology Corporation
22141 Ventura Blvd.
SOUTHEAST REGION
Linear Technology Corporation
17060 Dallas Parkway
Suite 208
Dallas, TX 75248
Phone: (214) 733-3071
FAX: (214) 380-5138
NORTHEAST REGION
Linear Technology Corporation
One Oxford Valley
2300 E. Lincoln Hwy.,Suite 306
Langhorne, PA 19047
Phone: (215) 757-8578
FAX: (215) 757-5631
Suite 206
Woodland Hills, CA 91364
Phone: (818) 703-0835
FAX: (818) 703-0517
NORTHWEST REGION
Linear Technology Corporation
782 Sycamore Dr.
CENTRAL REGION
Linear Technology Corporation
Chesapeake Square
Linear Technology Corporation
266 Lowell St., Suite B-8
Wilmington, MA 01887
Milpitas, CA 95035
Phone: (408) 428-2050
FAX: (408) 432-6331
229 Mitchell Court, Suite A-25
Addison, IL 60101
Phone: (708) 620-6910
FAX: (708) 620-6977
Phone: (508) 658-3881
FAX: (508) 658-2701
International Sales Offices
KOREA
FRANCE
Linear Technology Korea Branch
Namsong Building, #505
Itaewon-Dong 260-199
Yongsan-Ku, Seoul
Korea
TAIWAN
Linear Technology S.A.R.L.
Immeuble "Le Quartz"
58 Chemin de la Justice
92290 Chatenay Malabry
France
Linear Technology Corporation
Rm. 801, No. 46, Sec. 2
Chung Shan N. Rd.
Taipei, Taiwan, R.O.C.
Phone: 886-2-521-7575
FAX: 886-2-562-2285
Phone: 82-2-792-1617
FAX: 82-2-792-1619
Phone: 33-1-41079555
FAX: 33-1-46314613
SINGAPORE
UNITED KINGDOM
GERMANY
Linear Technology Pte. Ltd.
101 Boon Keng Road
#02-15 Kallang Ind. Estates
Singapore 1233
Linear Technology (UK) Ltd.
The Coliseum, Riverside Way
Camberley, Surrey GU15 3YL
United Kingdom
Linear Techonolgy GmbH
Untere Hauptstr. 9
D-85386 Eching
Germany
Phone: 65-293-5322
FAX: 65-292-0398
Phone: 44-276-677676
FAX: 44-276-64851
Phone: 49-89-3197410
FAX: 49-89-3194821
JAPAN
Linear Technology KK
5F YZ Bldg.
4-4-12 Iidabashi, Chiyoda-Ku
Tokyo, 102 Japan
Phone: 81-3-3237-7891
FAX: 81-3-3237-8010
World Headquarters
Linear Technology Corporation
1630 McCarthy Blvd.
Milpitas, CA 95035-7487
Phone: (408) 432-1900
FAX: (408) 434-0507
08/16/93
LT/GP 0394 10K • PRINTED IN USA
12 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
●
●
LINEAR TECHNOLOGY CORPORATION 1994
(408) 432-1900 FAX: (408) 434-0507 TELEX: 499-3977
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