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LM10504 データシート(PDF) 6 Page - Texas Instruments

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部品番号 LM10504
部品情報  LM10504 Triple Buck LDO Power Management Unit
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
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LM10504
SNVS739E – DECEMBER 2011 – REVISED MARCH 2013
www.ti.com
Buck 1 Electrical Characteristics
(1)(2)(3) (continued)
Unless otherwise noted, VIN = 5.0V where: VIN=VIN_B1 = VIN_B2 = VIN_B3. Limits appearing in normal type apply for TJ = 25°C.
Limits appearing in boldface type apply over the entire operating junction temperature range of
−30°C ≤ TA = TJ ≤ +85°C.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
FSW
Switching frequency
1.75
2
2.3
MHz
CIN
Input capacitor (4)
4.7
µF
Output filter capacitor (4)
10
10
100
COUT
0mA
≤ IOUT ≤ IOUT-MAX
Output capacitor ESR (4)
20
m
L
Output filter inductance (4)
2.2
µH
DC line regulation (4)
3.3V
≤ VIN ≤ 5.0V, IOUT = IOUT-MAX
0.5
%/V
ΔVOUT
DC load regulation (4)
100 mA
≤ IOUT ≤ IOUT-MAX
0.3
%/A
IFB
Feedback pin input bias current
VFB = 3.0V
2.1
5
µA
135
RDS-ON-HS
High side switch on resistance
m
VIN = 2.6V
215
RDS-ON-LS
Low side switch on resistance
85
190
m
Used in parallel with the high side FET
while in Bypass mode. Resistance (DCR)
of inductor = 100 m
RDS-ON-BYPASS
Bypass FET on resistance
VIN = 3.3V
85
m
VIN = 2.6V
120
STARTUP
Startup from shutdown, VOUT = 0V, no
load, LC = recommended circuit, using
TSTART
Internal soft-start (turn on time) (4)
0.1
ms
software enable, to VOUT = 95% of final
value
Buck 2 Electrical Characteristics
(1) (2) (3)
Unless otherwise noted, VIN = 5.0V where: VIN=VIN_B1 = VIN_B2 = VIN_B3. Limits appearing in normal type apply for TJ = 25°C.
Limits appearing in boldface type apply over the entire operating junction temperature range of
−30°C ≤ TA = TJ ≤ +85°C.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
IQ
VIN DC bias current
No Load, PFM Mode
15
50
µA
Continuous maximum load current
IOUT_MAX
Buck 2 enabled, switching in PWM
1.0
A
(4) (5) (6)
IPEAK
Peak switching current limit
Buck 2 enabled, switching in PWM
1.35
1.56
1.8
A
η
Peak efficiency (4)
IOUT = 0.3A
90
%
FSW
Switching frequency
1.75
2
2.3
MHz
CIN
Input capacitor (4)
4.7
µF
Output filter capacitor (4)
10
10
100
COUT
0mA
≤ IOUT ≤ IOUT-MAX
Output capacitor ESR (4)
20
m
L
Output filter inductance (4)
2.2
µH
DC line regulation (4)
3.3V
≤ VIN ≤ 5.0V, IOUT = IOUT-MAX
0.5
%/V
ΔVOUT
DC load regulation (4)
100 mA
≤ IOUT ≤ IOUT-MAX
0.3
%/A
(1)
All limits are ensured by design, test and/or statistical analysis. All electrical characteristics having room-temperature limits are tested
during production with TJ = 25°C. All hot and cold limits are ensured by correlating the electrical characteristics to process and
temperature variations and applying statistical process control.
(2)
Capacitors: Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) are used in setting electrical characteristics.
(3)
BUCK normal operation is ensured if VIN ≥ VOUT+1.0V.
(4)
Specification ensured by design. Not tested during production.
(5)
In applications where high power dissipation and/or poor thermal resistance is present the maximum ambient temperature may have to
be derated. Maximum ambient temperature (TA-MAX) is dependent on the maximum operating junction temperature (TJ-MAX-OP = +125°C),
the maximum power dissipation of the device in the application (PD-MAX), and the junction-to-ambient thermal resistance of the
part/package in the application (
θJA), as given by the following equation: TA-MAX = TJ-MAX-OP – (θJA × PD-MAX).
(6)
The amount of Absolute Maximum power dissipation allowed for the device depends on the ambient temperature and can be calculated
using the formula: P = (TJ–TA)/θJA, where TJ is the junction temperature, TA is the ambient temperature, and θJA is the junction-to-
ambient thermal resistance.
θJA is highly application and board-layout dependent. Internal thermal shutdown circuitry protects the device
from permanent damage. (See General Electrical Characteristics.)
6
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