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LM2623 Arkusz danych(PDF) 5 Page - Texas Instruments

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Numer części LM2623
Szczegółowy opis  General-Purpose, Gated-Oscillator-Based DC/DC Boost Converter
Download  22 Pages
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Producent  TI [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI - Texas Instruments

LM2623 Arkusz danych(HTML) 5 Page - Texas Instruments

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V
DD
= 3.3V
TEMPERATURE (ºC)
-40
-25
-10
5
20
35
50
65
80
1.2365
1.236
1.2355
1.235
1.2345
1.234
1.2335
1.233
1.2325
300mA
600mA
10mA
60.0
65.0
70.0
75.0
80.0
85.0
90.0
95.0
1.8
2.1
2.4 2.7
3.0
3.3
3.6
3.9 4.2
4.5
Vin
LM2623
www.ti.com
SNVS188H – MAY 2004 – REVISED NOVEMBER 2014
6.5 Electrical Characteristics
Limits apply for TJ = 25°C and VDD = VOUT = 3.3 V, unless otherwise specified.
PARAMETER
TEST CONDITION
MIN
TYP
MAX
UNIT
VDD_ST
Start-up supply voltage 25°C
ILOAD = 0 mA
(1)
1.1
V
VIN_OP
Minimum operating supply
ILOAD = 0 mA
0.65
0.8
V
voltage (once started)
VFB
FB pin voltage
1.24
V
−40°C to 85°C
1.2028
1.2772
VOUT_MAX
Maximum output voltage
14
V
VIN = 3.6 V; VOUT = 5 V;
87%
ILOAD = 500 mA
η
Efficiency
VIN = 2.5 V; VOUT = 3.3 V;
87%
ILOAD = 200 mA
D
Switch duty cycle
17
IDD
Operating quiescent current(2)
FB Pin > 1.3 V; EN Pin at VDD
80
µA
FB Pin > 1.3 V; EN Pin at VDD, −40°C to
110
85°C
VDD, BOOT and SW Pins at 5 V;
0.01
EN Pin < 200 mV
ISD
Shutdown quiescent current(3)
µA
VDD, BOOT and SW Pins at 5 V;
2.5
EN Pin < 200 mV,
−40°C to 85°C
ICL
Switch peak current limit
LM2623A
2.2
2. 85
A
IC
Switch peak current limit
LM2623
1.2
RDS_ON
MOSFET switch on resistance
0.17
Ω
−40°C to 85°C
0.26
ENABLE SECTION
VEN_LO
EN pin voltage low(4)
−40°C to 85°C
0.15 VDD
V
VEN_HI
EN pin voltage high(4)
−40°C to 85°C
0.7 VDD
(1)
VDD tied to BOOT and EN pins. Frequency pin tied to VDD through 121K resistor. VDD_ST = VDD when start-up occurs. VIN is VDD + D1
voltage (usually 10 mV to 50 mV at start-up).
(2)
This is the current into the VDD pin.
(3)
This is the total current into pins VDD, BOOT, SW and FREQ.
(4)
When the EN pin is below VEN_LO, the regulator is shut down; when it is above VEN_HI, the regulator is operating.
6.6 Typical Characteristics
VOUT = 5 V
Figure 1. Efficiency vs Supply Voltage
Figure 2. VFB vs Temperature
Copyright © 2004–2014, Texas Instruments Incorporated
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