MIC2178 데이터 시트보기 (PDF) - Micrel
부품명
상세내역
제조사
MIC2178 Datasheet PDF : 15 Pages
| |||
MIC2178
Absolute Maximum Ratings
Supply Voltage [100ms transient] (VIN) ......................... 18V
Output Switch Voltage (VSW) ........................................ 18V
Output Switch Current (ISW) ......................................... 6.0A
Enable, PWM Control Voltage (VEN, VPWM) ................. 18V
Sync Voltage (VSYNC) ..................................................... 6V
Micrel, Inc.
Operating Ratings
Supply Voltage (VIN) ..................................... 4.5V to 16.5V
Junction Temperature Range (TJ) ........... –40°C to +125°C
Electrical Characteristics
VIN = 7.0V; TA = 25°C, bold indicates –40°C ≤ TA ≤ 85°C; unless noted.
Symbol
Parameter
Condition
ISS
VBIAS
VFB
VOUT
VTH
VTL
IFB
Input Supply Current
Bias Regulator Output Voltage
Feedback Voltage
Output Voltage
Undervoltage Lockout
Feedback Bias Current
PWM mode, output not switching,
4.5V ≤ VIN ≤ 16.5V
skip mode, output not switching,
4.5V ≤ VIN ≤ 16.5V
VEN = 0V, 4.5V ≤ VIN ≤ 16.5V
VIN = 16.5V
MIC2178 [adj.]: VOUT = 3.3V, ILOAD = 0
MIC2178 [adj.]: VOUT = 3.3V,
5V ≤ VIN ≤ 16V, 10mA ≤ ILOAD ≤ 2A
MIC2178-5.0: ILOAD = 0
MIC2178-5.0:
6V ≤ VIN ≤ 16V, 10mA ≤ ILOAD ≤ 2A
MIC2178-3.3: ILOAD = 0
MIC2178-3.3:
5V ≤ VIN ≤ 16V, 10mA ≤ ILOAD ≤ 2A
upper threshold
lower threshold
MIC2178 [adj.]
MIC2178-5.0, MIC2178-3.3
AVOL
Error Amplifier Gain
Error Amplifier Output Swing
0.6V ≤ VCOMP ≤ 0.8V
upper limit
lower limit
Error Amplifier Output Current
source and sink
fO
DMAX
tON min
Oscillator Frequency
Maximum Duty Cycle
Minimum On-Time
SYNC Frequency Range
VFB = 1.0V
VFB = 1.5V
SYNC Threshold
SYNC Minimum Pulse Width
ISYNC
ILIM
SYNC Leakage
Current Limit
VSYNC = 0V to 5.5V
PWM mode, VIN = 12V
skip mode
RON
Switch On-Resistance
ISW
Output Switch Leakage
high-side switch, VIN = 12V
low-side switch, VIN = 12V
VSW = 16.5V
Min Typ Max Units
1.0
1.5
mA
600 750
µA
1
25
µA
3.10 3.30 3.4
V
1.22 1.245 1.27
V
3.20 3.3 3.40
V
3.14
3.46
V
4.85 5.0 5.15
V
4.85 5.0 5.15
4.75
5.25
V
3.20 3.3 3.40
V
3.20 3.3 3.40
V
3.14
3.46
V
4.25 4.35
V
3.90 4.15
V
60
150
nA
20
40
µA
15
18
20
0.9
1.5
V
0.05 0.1
V
15
25
35
µA
160 200 240 kHz
100
%
300 400
ns
220
300 kHz
0.8
1.6
2.2
V
500
ns
–1 0.01
1
µA
3.8
4.7
5.7
A
600
mA
90
250 mΩ
110 250 mΩ
1
10
µA
March 2005
3
M9999-031805
Share Link: 