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LMZ31506 Arkusz danych(PDF) 4 Page - Texas Instruments

Numer części LMZ31506
Szczegółowy opis  6A SIMPLE SWITCHER짰 Power Module with 2.95V-14.5V Input and Current Sharing in QFN Package
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Producent  TI [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI - Texas Instruments

LMZ31506 Arkusz danych(HTML) 4 Page - Texas Instruments

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LMZ31506
SNVS993 – JUNE 2013
www.ti.com
ELECTRICAL CHARACTERISTICS
Over –40°C to 85°C free-air temperature, PVIN = VIN = 12 V, VOUT = 1.8 V, IOUT = 6 A,
CIN1 = 2 x 22 µF ceramic, CIN2 = 68 µF poly-tantalum, COUT1 = 4 x 47 µF ceramic (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
IOUT
Output current
TA = 85°C, natural convection
0
6
A
VIN
Input bias voltage range
Over IOUT range
4.5
14.5
V
PVIN
Input switching voltage range
Over IOUT range
1.6(1)
14.5(2)
V
VIN = increasing
4.0
4.5
UVLO
VIN Undervoltage lockout
V
VIN = decreasing
3.5
3.85
VOUT(adj)
Output voltage adjust range
Over IOUT range
0.6(2)
5.5
V
Set-point voltage tolerance
TA = 25°C, IOUT = 0A
±1.0% (3)
Temperature variation
-40°C
≤ TA ≤ +85°C, IOUT = 0A
±0.3%
VOUT
Line regulation
Over PVIN range, TA = 25°C, IOUT = 0A
±0.1%
Load regulation
Over IOUT range, TA = 25°C
±0.1%
Total output voltage variation
Includes set-point, line, load, and temperature variation
±1.5% (3)
VOUT = 5 V, fSW = 780 kHz
92 %
VOUT = 3.3 V, fSW = 630 kHz
91 %
VOUT = 2.5 V, fSW = 530 kHz
89 %
PVIN = VIN = 12 V
IO = 2 A
VOUT = 1.8 V, fSW = 480 kHz
88 %
VOUT = 1.2 V, fSW = 480 kHz
85 %
VOUT = 0.8 V, fSW = 480 kHz
80 %
η
Efficiency
PVIN = VIN = 5 V
VOUT = 3.3V, fSW = 630 kHz
95 %
IO = 2 A
VOUT = 2.5V, fSW = 530 kHz
93 %
VOUT = 1.8V, fSW = 480 kHz
91 %
VOUT = 1.2V, fSW = 480 kHz
89 %
VOUT = 0.8V, fSW = 480 kHz
85 %
VOUT = 0.6V, fSW = 250 kHz
83 %
Output voltage ripple
20 MHz bandwith
30
mVPP
ILIM
Overcurrent threshold
11
A
Recovery time
80
µs
1.0 A/µs load step
Transient response
from 50 to 100% IOUT(max)
VOUT over/undershoot
60
mV
VINH-H
Inhibit High Voltage
1.30
Open (4)
Inhibit Control
V
VINH-L
Inhibit Low Voltage
–0.3
1.05
INH Input current
INH < 1.1 V
-1.15
μA
INH Hysteresis current
INH > 1.26 V
-3.4
μA
II(stby)
Input standby current
INH pin to AGND
2
4
µA
Good
94%
VOUT rising
Fault
109%
PWRGD Thresholds
Power
Fault
91%
Good
VOUT falling
Good
106%
PWRGD Low Voltage
I(PWRGD) = 2 mA
0.3
V
fSW
Switching frequency
Over VIN and IOUT ranges, RT/CLK pin OPEN
200
250
300
kHz
fCLK
Synchronization frequency
250
780
kHz
VCLK-H
CLK High-Level
2.0
5.5
V
CLK Control
VCLK-L
CLK Low-Level
0.8
V
DCLK
CLK Duty cycle
20%
80%
Thermal shutdown
160
175
°C
Thermal Shutdown
Thermal shutdown hysteresis
10
°C
(1)
The minimum PVIN voltage is 1.6V or (VOUT+ 0.9V), whichever is greater. VIN must be greater than 4.5V.
(2)
The maximum PVIN voltage is 14.5V or (15 x VOUT), whichever is less.
(3)
The stated limit of the set-point voltage tolerance includes the tolerance of both the internal voltage reference and the internal
adjustment resistor. The overall output voltage tolerance will be affected by the tolerance of the external RSET resistor.
(4)
This control pin has an internal pullup. If this pin is left open circuit, the device operates when input power is applied. A small low-
leakage MOSFET is recommended for control. See the application section for further guidance.
4
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