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PDF DP2596 Data sheet ( Hoja de datos )
| Número de pieza | DP2596 | |
| Descripción | 3A 150KHz Step-Down Voltage Regulator | |
| Fabricantes | DT-SEMI | |
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DP2596
3A 150KHz Step-Down Voltage Regulator
■ General Description
■ Features
The DP2596 regulator is monolithic integrated
3.3V, 5V, 12V, 15V, and adjustable output
circuit that provide all the active function for a
versions
step-down (buck) switching regulator, capable of
Adjustable version output voltage range,
driving 3A load with excellent line and load
1.23V to 37V ±4% max over line and load
regulator. These devices are available in fixed output
conditions
voltage of 3.3V, 5V, 12V, 15V, and adjustable output
Guaranteed 3A output current
version.
Wide input voltage range, 7V to 40V
Requiring a minimum number of external
Requires only 4 external components
components, these regulators are simple to use and
150KHz fixed frequency internal oscillator
include internal frequency compensation and a fixed
TTL shutdown capability, low power standby
frequency oscillator.
mode
The DP2596 offer a high efficiency replacement for
High efficiency
popular three terminal linear regulators. It
Uses readily available standard inductors
substantiality reduces the size of the heat sink, and
Thermal shutdown and current limit protection
in some cases no heat sink is required.
A standard series of inductors optimized for use ■ Application
with the DP2596 are available from several different
Simple high-efficiency step-down (buck)
manufacturers. This feature greatly simplifies the
regulator
design of switch-mode power supplies.
Efficient pre-regulator for linear regulators
Other features include a guaranteed ±4%
On-card switching regulator
tolerance on output voltage within specified input
Positive to negative converter (Buck-Boost)
voltages and output load conditions, and 10% on the
Power Supply for Battery Chargers
oscillator frequency. External shutdown is included,
Negative Step-Up Converters
featuring 80uA (typical) standby current. The output
switch includes cycle-by-cycle current limiting, as
well as thermal shutdown for full protection under
fault conditions.
■ Typical Application (Fixed Output Voltage Versions)
REV : 1.0
2011-09-22
1 www.dt-semi.com
1 page  
DP2596
3A 150KHz Step-Down Voltage Regulator
■ Electrical Characteristics ([Note 1] Test Circuit Figure 2) (Unless otherwise specified, VIN = 12V
for the 3,3V, 5.0V, and Adjustable version, VIN = 25V for the 12V version, and VIN = 30V for the 15V version.
ILOAD = 500mA. For typical values TJ =25°C, for min/max values TJ is the operating junction temperature
range that applies [Not2 2], Unless otherwise noted.)
DP2576 3.3V Output
Symbol
Characteristics
Min Typ Max Unit
Output Voltage (VIN=12V, ILOAD=0.5A, TJ =25°C)
3.2 3.3 3.4 V
Output Voltage (6V≦VIN≦40V, 0.5A≦ILOAD≦=3A)
VOUT
TJ =25°C
3.168 3.3 3.432 V
TJ = -40°C to +125°C
3.135
3.465
η Efficiency (VIN = 12V, ILOAD = 3A)
73 %
DP2576 5V Output
Symbol
Characteristics
Min Typ Max Unit
Output Voltage (VIN=12V, ILOAD=0.5A, TJ =25°C)
4.85 5 5.15 V
Output Voltage (8V≦VIN≦40V, 0.5A≦ILOAD≦=3A)
VOUT
TJ =25°C
4.8 5 5.2 V
TJ = -40°C to +125°C
4.75 5.25
η Efficiency (VIN = 12V, ILOAD = 3A)
80 %
DP2576 12V Output
Symbol
Characteristics
Min Typ Max Unit
Output Voltage (VIN=15V, ILOAD=0.5A, TJ =25°C)
11.64 12 12.36 V
Output Voltage (15V≦VIN≦40V, 0.5A≦ILOAD≦=3A)
VOUT
TJ =25°C
11.52 12 12.48 V
TJ = -40°C to +125°C
12.4 12.6
η Efficiency (VIN = 15V, ILOAD = 3A)
90 %
DP2576 15V Output
Symbol
Characteristics
VOUT
η
Output Voltage (VIN=30V, ILOAD=0.5A, TJ =25°C)
Output Voltage (18V≦VIN≦40V, 0.5A≦ILOAD≦=3A)
TJ =25°C
TJ = -40°C to +125°C
Efficiency (VIN = 18V, ILOAD = 3A)
Min
14.7
14.4
14.25
REV : 1.0
2011-09-22
5
Typ Max Unit
15 15.3 V
15 15.6 V
15.75
98 %
www.dt-semi.com
5 Page 
DP2596
3A 150KHz Step-Down Voltage Regulator
As in any switching regulator, layout is very important. Rapidly switching currents associated
with wiring inductance generate voltage transients which can cause problems. For minimal
inductance and ground loops, the wires indicated by heavy lines should be wide printed circuit
traces and should be kept as short as possible. For best results, external components should be
located as close to the switcher IC as possible using ground plane construction or single point
grounding.
In open core inductors are used, special care must be taken as to the location and positioning of
his type of inductor. Allowing the inductor flux to intersect sensitive feedback, IC ground path
and COUT wiring can cause problems. When using the Adjustable version, special care must be
taken as to the location of the feedback resistors and the associated wiring. Physically locate both
resistors near the IC, and route the wiring away from the inductor, especially an open core type
of inductor.
REV : 1.0
2011-09-22
www.dt-semi.com
11
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| PDF Descargar | [ Datasheet DP2596.PDF ] | |
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