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參數(shù)資料
| 型號： | L5994A |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1 A DUAL SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PQFP32 |
| 封裝： | TQFP-32 |
| 文件頁數(shù)： | 21/26頁 |
| 文件大?。?/td> | 322K |
| 代理商： | L5994A |
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Obsolete
Product(s)
- Obsolete
Product(s)
L5994 - L5994A
4/26
V5
Over voltage threshold ON
V1SNS
2.09
2.15
2.21
V
Under voltage threshold ON
V1SNS
1.66
1.71
1.76
V
SECTION 2 PWM CONTROLLER
V2out
V2SNS feedback voltage
Vin = 5V to 20V
NOSKIP = REG5
Vi2sns-Vv2sns = 0 to 40mA
1.566
1.64
1.714
V
V19-V20
Overcurrent Threshold current
VSOFT2 = 3.1V
37
50
63
mV
V19-V20
Pulse skipping mode threshold
voltage
Vin > 6.8V
13
mV
V20
Over voltage threshold ON
V2SNS
1.843
1.9
1.957
V
Under voltage threshold ON
V2SNS
1.451
1.496
1.541
V
PWM CONTROLLERS CHARACTERISTICS
fOSC
Switching frequency accuracy
OSC = 2.5V
OSC = GND OR 5V
255
170
300
200
345
230
KHz
V15
Voltage range for 300KHz
operation
2.4
2.6
V
Td
Dead time
HS rise
LS rise
50
30
ns
Tov
Over voltage propagation time
V1SNS to PWROK or
V2SNS to PWROK
1.25
s
Tuv
Under voltage propagation time
V1SNS to PWROK or
V2SNS to PWROK
1.5
s
V5,V20
Output UVLO threshold latched
Respect output voltage
65
70
75
%
I8,I17
Soft start current
3.2
4
4.8
A
V8,V17
Soft start clamp voltage
3.1
V
HIGH AND LOW SIDE GATE DRIVER (BOTH SECTIONS)
I25,I27
I32,I30
Source output peak current
Cload = 3.3nF
1
A
Sink output peak current
Cload = 3.3nF
1
A
RH
RdsON resistance
Driver out high
2.1
4
Ohm
RL
RdsON resistance
Driver out low
1.5
3
Ohm
VOH
Output high voltage
HSTRAP = PREG5
Isource = 10mA;
HSOURCE = GND
4.4
5.3
5.61
V
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
ELECTRICAL CHARACTERISTICS (continued)
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