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LM26480QSQX-CF/NOPB bảng dữ liệu(PDF) 7 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  LM26480-Q1 Externally Programmable Dual High-Current Step-Down DC-DC and Dual Linear Regulators
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LM26480QSQX-CF/NOPB bảng dữ liệu(HTML) 7 Page - Texas Instruments

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LM26480-Q1
www.ti.com
SNVSA58A – JANUARY 2015 – REVISED JUNE 2016
Product Folder Links: LM26480-Q1
Submit Documentation Feedback
Copyright © 2015–2016, Texas Instruments Incorporated
Low Dropout Regulators, LDO1 and LDO2 (continued)
Unless otherwise noted, VIN = 3.6 V, CIN = 1 µF, COUT = 0.47 µF, and values and limits apply for TJ = 25°C, unless otherwise
specified.
(1)(2)(3)(4)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
COUT
Output capacitor
Capacitance for stability 0°C
≤ TJ ≤ 125°C
0.47
µF
−40°C ≤ TJ ≤ 125°C
0.33
−40°C ≤ TJ ≤ 125°C
0.68
1
Equivalent series resistance (ESR)
TJ = −40°C to 125°C
5
500
m
(1)
All voltages are with respect to the potential at the GND pin.
(2)
Minimum (MIN) and maximum (MAX) limits are specified by design, test, or statistical analysis. Typical (TYP) numbers represent the
most likely norm.
(3)
CIN, COUT: Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) used in setting electrical characteristics.
(4)
The device maintains a stable, regulated output voltage without a load.
(5)
VIN ≥ VOUT + RDSON(P) (IOUT + 1/2 IRIPPLE). If these conditions are not met, voltage regulation will degrade as load increases.
(6)
Quiescent current is defined here as the difference in current between the input voltage source and the load at VOUT.
7.7 Buck Converters SW1, SW2
Unless otherwise noted, VIN = 3.6 V, CIN = 10 µF, COUT = 10 µF, LOUT = 2.2 µH, and limits apply for TJ = 25°C, unless
otherwise specified.
(1) (2) (3) (4)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VFB
(5)
Feedback voltage
−3%
3%
VOUT
Line regulation
2.8 V < VIN < 5.5 V
IOUT = 10 mA
0.089
%/V
Load regulation
100 mA < IOUT < IMAX
0.0013
%/mA
Eff
Efficiency
Load current = 250 mA
96%
ISHDN
Shutdown supply current
EN is de-asserted
0.01
1
µA
ƒOSC
Internal oscillator frequency
Default oscillator frequency = 2 MHz
1.6
2
2.4
MHz
Default oscillator frequency = 2.1 MHz
2.1
2.5
Default oscillator frequency = 2.1 MHz
TJ = −40°C to 125°C
1.7
IPEAK
Buck1 peak switching current
limit
2
2.4
A
Buck2 peak switching current
limit
2
2.4
IQ
Quiescent current on(6)
No load PFM mode
33
µA
No load PWM mode (forced PWM)
2
mA
RDSON (P)
Pin-pin resistance PFET
200
400
m
RDSON (N)
Pin-pin resistance NFET
180
400
TON
Turnon time
Start-up from shutdown
500
µsec
CIN
Input capacitor
Capacitance for stability
10
µF
COUT
Output capacitor
Capacitance for stability
10


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