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LM3561 データシート(PDF) 5 Page - Texas Instruments

部品番号 LM3561
部品情報  Synchronous Boost Converter
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ホームページ  http://www.ti.com
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LM3561 データシート(HTML) 5 Page - Texas Instruments

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LM3561
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SNOSB44C – MARCH 2011 – REVISED MAY 2013
Electrical Characteristics (continued)
Limits in standard typeface are for TA = +25°C. Limits in boldface type apply over the full operating ambient temperature
range (-40°C
≤ TA ≤ +85ºC). Unless otherwise specified, VIN = 3.6V, VHWEN = VIN.
(1) (2)
Parameter
Test Conditions
Min
Typ
Max
Unit
2.7V
≤ VIN ≤ 5.5V, HWEN = IN,
ISTBY
Standby supply current
1.1
2.3
µA
Enable Register bit [1:0] = 00
Flash-to-torch LED current
TX_ Low-to-High,
2
settling time
ILED = 600mA to 93.2mA
tTX
µs
Torch-to-flash LED current
TX_ Low-to-High,
80
settling time
ILED = 93.2mA to 600mA
VIN Falling,
VIN_TH
VIN monitor trip threshold
VIN Monitor Register = 0x01
2.84
2.90
2.95
V
(Enabled with VIN_TH = 2.9V)
HWEN, STROBE, TX1/TORCH/GPIO1, TX2/INT/GPIO2 Voltage Specifications
VIL
Input logic low
2.7V
≤ VIN ≤ 5.5V
0
0.4
V
VIH
Input logic high
2.7V
≤ VIN ≤ 5.5V
1.2
VIN
V
Output logic low
VOL
ILOAD = 3mA, 2.7V ≤ VIN ≤ 5.5V
0.4
V
(GPIO1,GPIO2, INT)
Internal pulldown resistance at
RTX1
300
k
TX1/TORCH/GPIO1
Internal pulldown resistance at
RTX2
300
k
TX2/GPIO2
Internal pulldown resistance at
RSTROBE
300
k
STROBE
I2C-Compatible Voltage Specifications (SCL, SDA)
VIL
Input Logic Low
2.7V
≤ VIN ≤ 5.5V
0
0.4
V
VIH
Input Logic High
2.7V
≤ VIN ≤ 5.5V
1.3
VIN
V
VOL
Output Logic Low (SDA)
ILOAD = 3mA, 2.7V ≤ VIN ≤ 5.5V
400
mV
I2C-Compatible Timing Specifications (SCL, SDA) (5) see Figure 4
fSCL
SCL(Clock Frequency)
0
400
kHz
Rise Time of Both SDA and
20 + 0.1 ×
tRISE
(7)
300
ns
SCL
CBUS
20 + 0.1 ×
tFALL
(8)
Fall Time of Both SDA and SCL
300
ns
CBUS
tLOW
Low Period of SCL Clock
1.3
µs
tHIGH
High Period of SCL Clock
600
ns
Hold Time for Start (or
tHD;STA
600
ns
Repeated Start) Condition
Set-up Time for a Repeated
tSU;STA
600
ns
Start
tHD;DAT
Data Hold Time
0
ns
tSU;DAT
Data Setup Time
100
ns
tSU;STO
Set-up Time for Stop Condition
600
ns
tVD;DAT
Data Valid Time
900
ns
tVD;ACK
Data Valid Acknowledge Time
900
ns
Bus Free Time Between a Start
tBUF
1.3
µs
and a Stop Condition
(7)
Min rise and fall times on SDA and SCL can typically be less than 20ns.
(8)
Min rise and fall times on SDA and SCL can typically be less than 20ns.
Copyright © 2011–2013, Texas Instruments Incorporated
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