LT1528CQ Linear Technology, LT1528CQ Datasheet - Page 6

IC LDO REG 3.3V/ADJ 3A DDPAK-5

LT1528CQ

Manufacturer Part Number
LT1528CQ
Description
IC LDO REG 3.3V/ADJ 3A DDPAK-5
Manufacturer
Linear Technology
Datasheet

Specifications of LT1528CQ

Regulator Topology
Positive Fixed and Adjustable
Voltage - Output
3.3V, 3.3 ~ 14.15 V
Voltage - Input
3.9 ~ 15 V
Voltage - Dropout (typical)
0.57V @ 3A
Number Of Regulators
1
Current - Output
3A
Current - Limit (min)
3.2A
Operating Temperature
0°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
TO-263-5, D²Pak (5 leads + Tab), TO-263BA
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LT1528CQ
Manufacturer:
LT
Quantity:
5 510
Part Number:
LT1528CQ
Manufacturer:
ATMEL
Quantity:
5 510
Part Number:
LT1528CQ
Manufacturer:
LT
Quantity:
1 000
Part Number:
LT1528CQ
Manufacturer:
LT/凌特
Quantity:
20 000
Part Number:
LT1528CQ#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
TYPICAL PERFORMANCE CHARACTERISTICS
LT1528
PIN FUNCTIONS
OUTPUT (Pin 1): The OUTPUT pin supplies power to the
load. A minimum output capacitor of 3.3μF is required
to prevent oscillations. Larger values will be needed to
achieve the transient performance required by high speed
microprocessors. See the Applications Information sec-
tion for more on output capacitance and reverse output
characteristics.
SENSE (Pin 2): The SENSE pin is the input to the error
amplifi er. Optimum regulation will be obtained at the point
where the SENSE pin is connected to the OUTPUT pin. For
most applications the SENSE pin is connected directly to
the OUTPUT pin at the regulator. In critical applications
small voltage drops caused by the resistance (R
traces between the regulator and the load, which would
6
–100
100
–50
50
80
70
60
50
40
30
20
10
0
3
2
1
0
0
0
10
Ripple Rejection
Transient Response
I
V
OUT
IN
20
= 6V + 50mV
= 1.5A
40
100
60
SOLID TANTALUM
SOLID TANTALUM
C
FREQUENCY (Hz)
OUT
80
RMS
TIME (μs)
1k
= 4 × 47μF
C
100
OUT
RIPPLE
120
= 47μF
10k
140
V
C
C
IN
IN
OUT
160
100k
= 5V
= 3.3μF
= 47μF
1528 TPC21
180
1528 TPC19
200
1M
P
) of PC
normally degrade regulation, may be eliminated by con-
necting the SENSE pin to the OUTPUT pin at the load as
shown in Figure 1 (Kelvin Sense Connection). Note that
the voltage drop across the external PC traces will add
to the dropout voltage of the regulator. The SENSE pin
bias current is 150μA at the nominal regulated output
voltage. See SENSE Pin Current vs Temperature in the
Typical Performance Characteristics section. This pin is
internally clamped to – 0.6V (one V
The SENSE pin can also be used with a resistor divider
to achieve output voltages above 3.3V. See the Applica-
tions Information section for information on adjustable
operation.
–100
–10
–15
–20
–25
–30
100
–50
–5
50
0
0
3
2
1
0
–50
0
Load Regulation
Transient Response
V
C
C
IN
IN
OUT
20
–25
= 5V
= 3.3μF
= 4 × 47μF
40
0
60
TEMPERATURE (°C)
V
80
IN
25
TIME (μs)
= V
100
ΔI
OUT
50
LOAD
120
(NOMINAL) + 1V
= 1mA TO 3A
140
BE
75
).
160
100
1528 TPC22
1528 TPC20
180
200
125
1528fb

Related parts for LT1528CQ