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MIC2193 Datasheet(PDF) 3 Page - Micrel Semiconductor

Part # MIC2193
Description  400KHZ SO 8 SYNCHRONOUS BUCK CONTROL IC
PDF  10 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC2193 Datasheet(HTML) 3 Page - Micrel Semiconductor

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April 2004
3
M9999-042704
MIC2193
Micrel
Electrical Characteristics
V
IN = 5V, VOUT = 3.3V, TJ = 25°C, unless otherwise specified. Bold values indicate –40°C<TJ<+125°C.
Parameter
Condition
Min
Typ
Max
Units
Regulation
Feedback Voltage Reference
(1%)
1.233
1.245
1.257
V
(2%)
1.22
1.245
1.27
V
Feedback Bias Current
50
nA
Output Voltage Line Regulation
5V
≤ V
IN ≤12V
0.09
% / V
Output Voltage Load Regulation
0mV < (V
IN – VCS) < 75mV
0.9
%
Output Voltage Total Regulation
5V
≤V
IN ≤12V, 0mV < (VIN – VCS) < 75mV (±3%)
1.208
1.282
V
Input & V
DD Supply
V
IN Input Current (IQ)
(excluding external MOSFET gate current)
1
2
mA
Digital Supply Voltage (V
DD)IL = 0
2.82
3.0
3.18
V
Digital Supply Load Regulation
I
L = 0 to 1mA
0.1
V
Undervoltage Lockout
V
DD upper threshold (turn on threshold)
2.65
V
UVLO Hysteresis
100
mV
Current Limit
Current Limit Threshold Voltage
V
IN – VCS voltage to trip current limit
90
110
130
mV
Error Amplifier
Error Amplifier Gain
20
V/V
Current Amplifier
Current Amplifier Gain
3.0
V/V
Oscillator Section
Oscillator Frequency (f
O)
360
400
440
kHz
Maximum Duty Cycle
V
FB = 1.0V
100
%
Minimum On Time
V
FB = 1.5V
165
ns
Frequency Foldback Threshold
Measured on FB
0.3
V
Frequency Foldback Frequency
90
kHz
Absolute Maximum Ratings (Note 1)
Supply Voltage (V
IN) ..................................................... 15V
Digital Supply Voltage (V
DD) ........................................... 7V
Comp Pin Voltage (V
COMP) ............................ –0.3V to +3V
Feedback Pin Voltage (V
FB) .......................... –0.3V to +3V
Current Sense Voltage (V
IN – VCS) ................ –0.3V to +1V
Power Dissipation (P
D) ..................... 285mW @ TA = 85°C
Ambient Storage Temp ............................ –65
°C to +150°C
ESD Rating Note 3 ....................................................... 2kV
Operating Ratings (Note 2)
Supply Voltage (V
IN) .................................... +2.9V to +14V
Junction Temperature ....................... –40
°C ≤ T
J ≤ +125°C
Package Thermal Resistance
θ
JA 8-lead SOP ................................................. 140°C/W



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