900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Linear Technology Electronic Components Datasheet

LT1573 Datasheet

Low Dropout PNP Regulator Driver

No Preview Available !

FEATURES
s Low Cost Solution for High Current, Low Dropout
Regulators
s Fast Transient Response Needs Much Less
Bulk Capacitance
s Latching Overload Protection Minimizes
Heat Sink Size
s Precision Output Voltage (1%)
s Single Supply Operation: VIN = 2.8V to 10V
s Small Surface Mount Package
s Capable of Very Low Dropout Voltage (<0.2V)
s Fixed or Adjustable Outputs
s Shutdown
U
APPLICATIO S
s 3.3V to 2.5V Regulators
s Microprocessor Power Sources
s Post Regulator for Switching Supplies
s High Efficiency Linear Regulators
s Ultralow Dropout Regulators
s Low Voltage Linear Regulators
, LTC and LT are registered trademarks of Linear Technology Corporation.
LT1573
Low Dropout
PNP Regulator Driver
DESCRIPTIO
The LT ®1573 is a regulator driver IC designed to provide
a low cost solution for applications requiring high current,
low dropout and fast transient response. When combined
with an external PNP power transistor, this device pro-
vides load current up to 5A with dropout voltages as low
as 0.35V. The LT1573 circuitry is designed for extremely
fast transient response. This greatly reduces bulk storage
capacitance when the regulator is used in applications
with fast, high current load transients.
To keep cost and complexity low, the LT1573 uses a new
time-delayed latching overcurrent protection technique
that requires no external current sense resistor. Base drive
is limited for instantaneous protection, and a time-delayed
latch protects the regulator from continuous short
circuits.
The LT1573 is available as an adjustable regulator with an
output range of 1.27V to 6.8V and with fixed output
voltages of 2.5V, 2.8V and 3.3V. Output accuracy is better
than 1% to meet the critical regulation requirement of fast
microprocessors. A special 8-pin, fused-lead surface mount
package is used to minimize regulator footprint and pro-
vide adequate heat sinking.
TYPICAL APPLICATIO
FB COMP
CC
100pF
RC
1k
+
CTIME
VIN
5V
LATCH
VOUT
LT1573
SHDN
VIN
GND DRIVE
CIN
100µF
TANT
RD RB
2450
QOUT
MOTOROLA
D45H11
+
COUT1
1µF
+
CER
× 24
COUT2
220µF
TANT
R1
1.6k
R2
1k
LOAD
VOUT = 1.265V (1 + R1/R2)
FOR T < 45°C, COUT1 = 24 × 1µF Y5V CERAMIC SURFACE MOUNT CAPACITORS.
FOR T > 45°C, COUT1 = 24 × 1µF X7R CERAMIC SURFACE MOUNT CAPACITORS.
PLACE COUT1 IN THE MICROPROCESSOR SOCKET CAVITY
Figure 1. 3.3V, 5A Microprocessor Supply
VOUT
3.3V
GND
1573 F01
Transient Response for
0.2A to 5A Output Load Step
50mV/DIV
2.5A/DIV
10µs/DIV
1573 F01a
1


Linear Technology Electronic Components Datasheet

LT1573 Datasheet

Low Dropout PNP Regulator Driver

No Preview Available !

LT1573
ABSOLUTE AXI U RATI GS
(Note 1)
Input Pin Voltage (VIN to GND) ............................... 10V
Drive Pin Voltage (VDRIVE to GND) .......................... 10V
Output Pin Voltage (VOUT to GND) .......................... 10V
Shutdown Pin Voltage (VSHDN to GND) .................. 10V
Operating Junction Temperature Range
LT1573C ............................................... 0°C to 125°C
LT1573I ............................................ –40°C to 125°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec.)................ 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
FB 1
LATCH 2
SHDN 3
GND 4
8 COMP
7 VOUT
6 VIN
5 DRIVE
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 85°C/ W
Consult factory for Military grade parts.
ORDER PART
NUMBER
LT1573CS8
LT1573CS8-2.5
LT1573CS8-2.8
LT1573CS8-3.3
LT1573IS8
S8 PART MARKING
1573 157333
157325 1573I
157328
ELECTRICAL CHARACTERISTICS The q denotes specifications that apply over the full operating temperature
range, otherwise specifications are at TA = 25°C. VIN = 5V, VDRIVE = 3V, unless otherwise noted.
PARAMETER
DC Characteristics
LT1573 Reference Voltage (Adjustable)(Note 2)
LT1573-3.3 Output Voltage (Note 2)
LT1573-2.8 Output Voltage (Note 2)
LT1573-2.5 Output Voltage (Note 2)
Line Regulation
LT1573 (VFB)
LT1573-3.3 (VOUT)
LT1573-2.8 (VOUT)
LT1573-2.5 (VOUT)
Load Regulation
LT1573 (VFB)
LT1573-3.3 (VOUT)
LT1573-2.8 (VOUT)
LT1573-2.5 (VOUT)
FB Pin Bias Current (Adjustable Only)
DRIVE Pin Current
DRIVE Pin Saturation Voltage
SHDN Pin Threshold Voltage
SHDN Pin Current
CONDITIONS
IDRIVE = 20mA, TJ = 25°C
5mA < IDRIVE < 250mA, 3V < VIN < 7V,
1.5V < VDRIVE < 7V
IDRIVE = 20mA. TJ = 25°C
5mA < IDRIVE < 250mA, 3.5V < VIN < 7V,
1.5V < VDRIVE < 7V
IDRIVE = 20mA, TJ = 25°C
5mA < IDRIVE < 250mA, 3V < VIN < 7V,
1.5V < VDRIVE < 7V
IDRIVE = 20mA, TJ = 25°C
5mA < IDRIVE < 250mA, 3V < VIN < 7V,
1.5V < VDRIVE < 7V
IDRIVE = 20mA, 3V < VIN < 7V
IDRIVE = 20mA, 3.5V < VIN < 7V
IDRIVE = 20mA, 3V < VIN < 7V
IDRIVE = 20mA, 3V < VIN < 7V
IDRIVE = 20mA to 250mA
IDRIVE = 20mA to 250mA
IDRIVE = 20mA to 250mA
IDRIVE = 20mA to 250mA
VFB = 1.265V
VFB = 1.35V, VDRIVE = 7V
VFB = 1.15V, VDRIVE = 1.5V
IDRIVE = 20mA, VFB = 1.15V
IDRIVE = 250mA, VFB = 1.15V
VSHDN = 5V
MIN TYP MAX
UNITS
1.252
q 1.225
1.265
1.265
1.278
1.305
3.267 3.3 3.333
q 3.234 3.3 3.366
2.772 2.8 2.828
q 2.744 2.8 2.856
2.475 2.5 2.525
q 2.450 2.5 2.550
V
V
V
V
V
V
V
V
q 0.17 2
q 0.34 5
q 0.34 4
q 0.25 4
q 7 30
q 18 40
q 15 34
q 13 30
q 0.8 5
q
q 250
440
2
q 0.12 0.3
q 0.73 1.4
q 1.0 1.33 1.6
200
mV
mV
mV
mV
mV
mV
mV
mV
µA
mA
mA
V
V
V
µA
2


Part Number LT1573
Description Low Dropout PNP Regulator Driver
Maker Linear Technology
PDF Download

LT1573 Datasheet PDF





Similar Datasheet

1 LT1571 Constant-Current/ Constant-Voltage Battery Charger with Preset Voltage and Termination Flag
Linear Technology
2 LT1572 100kHz/ 1.25A Switching Regulator with Catch Diode
Linear Technology
3 LT1573 Low Dropout PNP Regulator Driver
Linear Technology
4 LT1575 Ultrafast Transient Response/ Low Dropout Regulators Adjustable and Fixed
Linear Technology
5 LT1576 1.5A/ 200kHz Step-Down Switching Regulator
Linear Technology
6 LT1576-5 1.5A/ 200kHz Step-Down Switching Regulator
Linear Technology
7 LT1577 Ultrafast Transient Response/ Low Dropout Regulators Adjustable and Fixed
Linear Technology
8 LT1578 1.5A/ 200kHz Step-Down Switching Regulator
Linear Technology
9 LT1578-2.5 1.5A/ 200kHz Step-Down Switching Regulator
Linear Technology





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy