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LM3668-Q1 Datasheet(PDF) 5 Page - Texas Instruments

No. de pieza LM3668-Q1
Descripción Electrónicos  1A, High-Efficiency Dual-Mode Single-Inductor Buck-Boost DC-DC Converter
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
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LM3668-Q1 Datasheet(HTML) 5 Page - Texas Instruments

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LM3668-Q1
www.ti.com
SNVSA84A – APRIL 2015 – REVISED MAY 2015
6.5 Electrical Characteristics
Unless otherwise noted, specifications apply to the LM3668-Q1. VOUT = 4.5V-5 V, VIN = 4 V.
(1) (2)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VFB
Feedback voltage
−40°C ≤ TA ≤ 125°C, see
(2)
–3%
3%
Switch peak current limit
Open loop(3)
1.85
ILIM
A
Switch peak current limit
Open loop(3),
−40°C ≤ TA ≤ 125°C
1.6
2.05
Shutdown supply current
EN = 0 V
0.01
ISHDN
µA
Shutdown supply current
EN = 0 V,
−40°C ≤ TA ≤ 125°C
1
No load, device is not switching (FB
DC bias current in PFM
forced higher than programmed output
45
voltage)
IQ_PFM
µA
No load, device is not switching (FB
forced higher than programmed output
DC bias current in PFM
60
voltage)
−40°C ≤ TA ≤ 125°C
DC bias current in PWM
PWM mode, no switching
600
IQ_PWM
µA
PWM mode, no switching
DC bias current in PWM
750
−40°C ≤ TA ≤ 125°C
RDSON(P)
Pin-pin resistance for PFET
Switches P1 and P2
130
180
m
RDSON(N)
Pin-pin resistance for NFET
Switches N1 and N2
100
150
m
PWM mode
2.2
FOSC
Internal oscillator frequency
MHz
PWM mode,
−40°C ≤ TA ≤ 125°C
1.9
2.5
FSYNC
Sync frequency range
VIN = 3.6 V
1.6
2.7
MHz
Logic high input for EN,
VIH
−40°C ≤ TA ≤ 125°C
1.1
V
MODE/SYNC pins
Logic low input for EN,
VIL
−40°C ≤ TA ≤ 125°C
0.4
V
MODE/SYNC pins
0.3
IEN, MODE,
EN, MODE/SYNC pins input current
µA
SYNC
−40°C ≤ TA ≤ 125°C
1
(1)
All voltages with respect to SGND.
(2)
Minimum and Maximum limits are specified by design, test, or statistical analysis. Typical numbers are not ensured, but do represent the
most likely norm.
(3)
Electrical Characteristics table reflects open loop data (FB = 0 V and current drawn from SW pin ramped up until cycle-by-cycle current
limits is activated). Closed loop current limit is the peak inductor current measured in the application circuit by increasing output current
until output voltage drops by 10%.
Copyright © 2015, Texas Instruments Incorporated
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