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LM3269 数据表(PDF) 5 Page - Texas Instruments

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部件名 LM3269
功能描述  Seamless-Transition Buck-Boost Converter
Download  27 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

LM3269 数据表(HTML) 5 Page - Texas Instruments

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LM3269
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SNVS793D – NOVEMBER 2011 – REVISED MAY 2015
6.5 Electrical Characteristics
Unless otherwise specified, typical (TYP) limits are for TA = TJ = 25°C, and minimum (MIN) and maximum (MAX) limits apply
over the full operating ambient temperature range (
−30°C ≤ TJ = TA ≤ +85°C). Unless otherwise noted, specifications apply to
the Figure 16 with: PVIN = EN = 3.6V.
(1) (2)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VFB, min
Min FB voltage
VCON = 0.2 V
0.53
0.60
0.67
V
VFB, max
Max FB voltage
VCON = 1.4 V
4.13
4.2
4.27
IQ_PWM
Quiescent current
No switching(3)
0.9
1.2
mA
EN = 0 V, VCON = 0 V,
ISHDN
Shutdown supply current
0.02
5
µA
SW1 = SW2 = VOUT = 0 V
Open loop(4)
ILIM_L
Input current limit (large)
1500
1700
1900
VCON = 1.2 V
mA
Open loop(4)
ILIM_S
Input current limit (small)
750
850
VCON = 0.2 V
Gain
Internal gain(5)
0.2 V
≤ VCON ≤ 1.4 V
3
V/V
IEN
EN pin pulldown current
5
10
µA
IVCON
VCON pin leakage current
–1
1
VIH
Logic high input threshold for EN
1.2
V
VIL
Logic low input threshold for EN
0.6
Leakage into VOUT pin of buck-
EN = 0 V, VOUT ≤ 4.2 V
IOUT_LEAKAGE
5
µA
boost
PVIN ≤ 5.5 V
(1)
All voltages are with respect to the potential at the GND pins.
(2)
Min and Max limits are specified by design, test, or statistical analysis. Typical numbers are not verified, but do represent the most likely
norm.
(3)
IQ specified here is when the part is not switching.
(4)
The parameters in the electrical characteristics table are tested under open loop conditions at PVIN = 3.6 V.
(5)
To calculate VOUT, use the following equation: VOUT = VCON × 3.
6.6 System Characteristics
The following spec table entries are specified by design and verification provided the component values in the typical
application circuit are used (L = 2.2 µH, DCR = 110 m
Ω, MIPSZ2520D2R2/FDK; CIN = 10 µF, 6.3 V, C1608X5R0J106K/TDK
(0603); COUT = 4.7 µF, 6.3 V, C1608X5R0J475M/TDK (0603). These parameters are not verified by production testing.
Typical (TYP) limits are for TA = TJ = 25°C; minimum (MIN) and maximum (MAX) limits apply over the full operating ambient
temperature range (
−30°C ≤ TJ = TA ≤ 85°C) and over the VBATT = PVIN = 2.7 V to 5.5 V, unless otherwise specified.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
IOUT_MAX
Max output current
VBATT ≥ 3 V, VOUT = 3.8 V
750
mA
VCON_LIN
VCON linearity
0.2 V
≤ VCON ≤ 1.4 V
–2.5%
2.5%
VBATT ≥ 3.2 V, 0.6 V ≤ VOUT ≤ 4.2 V,
Ripple voltage
15
50
0 mA
≤ IOUT ≤ 430 mA, TA = 25°C
PFM ripple
VOUT = 0.6 V, IOUT = 5 mA
45
VO_RIPPLE
mV
VBATT = 3 V to 5 V,
Ripple voltage in mode
TR = TF = 30 µs
50
transition
3.3 V
≤ VOUT ≤ 4.2 V
VBATT = 2.7 V to 4.7 V, VOUT = 3.8 V,
Line regulation
10
IOUT = 500 mA
ΔVOUT
mV
Load regulation
IOUT = 0 mA to 500 mA, VBATT = 2.7 V to 4.7 V
20
VBATT = 3.2 V to 4.7 V,
VOUT_TR
VOUT rise time
VOUT = 1.4 V to 3 V, 0.1 µs < Tr_VCON < 1 µs
10
µs
RLOAD = 11.4 Ω
Copyright © 2011–2015, Texas Instruments Incorporated
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