參數(shù)資料
型號(hào)： LA5681FN
元件分類(lèi)： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 520 kHz SWITCHING FREQ-MAX, QCC48
封裝： 7 X 7 MM, VQFN-48
文件頁(yè)數(shù)： 12/19頁(yè)
文件大?。?/td> 308K
代理商： LA5681FN
LA5681FN
No.A0374-2/19
Operating Condition at Ta
= 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Supply voltage
VBATT
1.5 to 12
V
VBATT = 1.5V
2.5 to 12
V
Supply voltage
VCC
VBATT = GND
1.8 to 12
V
Supply voltage
VBIAS
1.8 to 12
V
Timing resistance
RT
3 to 30
k
Ω
Timing capacity
CT
100 to 1000
pF
Triangular wave frequency
fOSC
0.1 to 1
MHz
Electrical Characteristics at Ta
= 25°C, VCC = VBIAS = 3V, SCP = 0V
Ratings
Parameter
Symbol
Conditions
min
typ
max
Unit
Error amplifier block
IN + pin internal bias voltage
VB
Value obtained by adding the error
amplifier offset to the plus-side
voltage of error amplifier
488.5
496.0
503.5
mV
Output “LOW” voltage
CH1 to CH4
VLow FB1
IN1- = 2.0, IFB1 = 20
μA
1
V
Output “HI” voltage
CH1 to CH4
VHi FB1
IN1- = 0V, IFB1 = 20
μA
2.25
V
Protection circuit
Threshold voltage
VSCP
1.1
1.25
1.4
V
SCP pin current
ISCP
3.8
μA
Soft start block (ch1 to ch6)
Soft start current
CH1 to CH6
ISF
CSOFT = 0V
3.2
4
4.8
μA
Soft start resistance
CH1 to CH6
RSF
160
200
240
k
Ω
Output block 1 to 6 (ch1 to ch6)
Maximum on-duty 1
CH1
Duty MAX1
OUT1 monitor, IN1- = 0V
100
%
Maximum on-duty 2
CH2
Duty MAX2
OUT2 monitor, IN2- = 0V
100
%
Maximum on-duty 2
CH3 to CH6
Duty MAX3, 4,
5, 6
OUT3, 4, 5, 6 monitor,
IN3, 4, 5, 6- = 0V
80
85
90
%
Output block 1 to 2 (ch1 to ch2)
OUT pin source current
IOUT12 SOUR
IN1, 2- = 1.0V, VOUT1, 2 = 2.7V,
ICAPH = 0.5mA
10
mA
OUT pin sink current
IOUT12 SINK
IN1, 2- = 0V, VOUT1, 2 = 2.3V
25
35
45
mA
Output block 3 to 6 (ch3 to ch6)
OUT pin source current
IOUT36 SOUR
IN3 to 6- = 0V CT1, CT2 = 0.6V
VOUT3 to 6 = 0.9V
20
30
40
mA
OUT pin sink current
IOUT36 SINK
IN3 to 6- = 1.0V
VOUT3, 4 = 0.3V
30
mA
OUT pin HIGH voltage
VOUT36 Hi
IN3 to 6- = 0V CT1, CT2 = 0.6V
IOUT3 to 6 = -10mA
2
V
OUT pin LOW voltage
VOUT36 Low
IN3 to 6- = 1.0V
IOUT3 to 6 = 10mA
0.2
V
Triangular wave generation block
Voltage of current setting pin
VT RT
RT = 5.6k
Ω
1.190
1.260
1.330
V
Output current
IOH CT
190
μA
Output current ratio
ΔIO CT
0.8
1.0
1.2
Oscillation frequency
FOSC1
RT = 5.6k
Ω, CT1, 2 = 560pF
340
430
520
kHz
Reference voltage block
Reference voltage
VREF
IREF = -1mA
1.230
1.243
1.256
V
Line regulation
VLN REF
VCC = 1.8V to 12V
10
mV
Load regulation
VLD REF
IREF = -0.1mA to -1mA
10
mV
Continued on next page.
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