MIC4680_08 Datasheet, PDF (3/15 Pages) Micrel Semiconductor – 1A 200kHz SuperSwitcher Buck Regulator

Micrel, Inc.
Absolute Maximum Ratings⁽¹⁾
Supply Voltage (V_IN)⁽³⁾ ..................................................+38V
Shutdown Voltage (V_SHDN)............................. –0.3V to +38V
Steady-State Output Switch Voltage (V_SW) ....................–1V
Feedback Voltage [Adjustable] (V_FB) ...........................+12V
Storage Temperature (T_s) .........................–65°C to +150°C
EDS Rating⁽⁵⁾
MIC4680
Operating Ratings⁽²⁾
Supply voltage (V_IN)⁽⁴⁾....................................... +4V to +34V
Junction Temperature (T_J) ....................................... +125°C
Package Thermal Resistance⁽⁶⁾
SIOC (θ_JA)..........................................................63°C/W
Electrical Characteristics
V_IN = 12V; I_LOAD = 500mA; T_J = 25°C, bold values indicate –40°C ≤ T_J ≤ +125°C, Note 7; unless noted.
Parameter
Condition
Min Typ
MIC4680 [Adjustable]
Feedback Voltage
(±1%)
(±1%)
1.217 1.230
1.205
8V ≤ V_IN ≤ 34V, 0.1A ≤ I_LOAD ≤ 1A, V_OUT = 5V
1.193 1.230
1.180
Maximum Duty Cycle
V_FB = 1.0V
93
97
Output Leakage Current V_IN = 34V, V_SHDN = 5V, V_SW = 0V
50
V_IN = 34V, V_SHDN = 5V, V_SW = –1V
4
Quiescent Current
V_FB = 1.5V
7
MIC4680-3.3
Output Voltage
(±1%)
(±3%)
3.266 3.3
3.201
6V ≤ V_IN ≤ 34V, 0.1A ≤ I_LOAD ≤ 1A
3.168 3.3
3.135
Maximum Duty Cycle
V_FB = 2.5V
93
97
Output Leakage Current V_IN = 34V, V_SHDN = 5V, V_SW = 0V
50
V_IN = 34V, V_SHDN = 5V, V_SW = –1V
4
Quiescent Current
V_FB = 4.0V
7
MIC4680-5.0
Output Voltage
(±1%)
(±3%)
4.950 5.0
4.85
8V ≤ V_IN ≤ 34V, 0.1A ≤ I_LOAD ≤ 1A
4.800 5.0
4.750
Maximum Duty Cycle
V_FB = 4.0V
93
97
Output Leakage Current V_IN = 34V, V_SHDN = 5V, V_SW = 0V
50
V_IN = 34V, V_SHDN = 5V, V_SW = –1V
4
Quiescent Current
V_FB = 6.0V
7
MIC4680/-3.3/-5.0
Frequency Fold Back
30
50
Oscillator Frequency
180 200
Saturation Voltage
I_OUT = 1A
1.4
Short Circuit
Current Limit
V_FB = 0V, see Test Circuit
1.3
1.8
Standby Quiescent
V_SHDN = V_IN
1.5
Current
V_SHDN = 5V (regulator off)
30
Max
1.243
1.255
1.267
1.280
500
20
12
3.333
3.399
3.432
3.465
500
20
12
5.05
5.15
5.200
5.250
500
20
12
100
220
1.8
2.5
100
Units
V
V
V
V
%
µA
mA
mA
V
V
V
V
%
µA
mA
mA
V
V
V
V
%
µA
mA
mA
kHz
kHz
V
A
µA
µA
March 2008
3
M9999-032808