MIC2199 Datasheet, PDF (3/15 Pages) Micrel Semiconductor – 300kHz 4mm × 4mm Synchronous Buck Converter

MIC2199
Absolute Maximum Ratings (Note 1)
Analog Supply Voltage (V_IN) ....................................... +34V
Digital Supply Voltage (V_DD) ......................................... +7V
Driver Supply Voltage (B_ST) .................................. V_IN + 7V
Sense Voltage (V_OUT, C_SH) ............................. 7V to –0.3V
Enable Pin Voltage (V_EN/UVLO) ...................................... V_IN
Power Dissipation (P_D)
4×4 MLF™ ................................. 665mW @ T_A = 85°C
Ambient Storage Temperature (T_S) ......... –65°C to +150°C
ESD, Note 3
Micrel
Operating Ratings (Note 2)
Analog Supply Voltage (V_IN) ........................ +4.5V to +32V
Output Voltage Range (V_OUT) ........................ +0.8V to +6V
Junction Temperature (T_J) ....................... –40°C to +125°C
Package Thermal Resistance
4×4 MLF-12L (θ_JA) .............................................. 60°C/W
Electrical Characteristics (Note 4)
V_IN = V_EN = 12V; T_J = 25°C, unless noted, bold values indicate –40°C ≤ T_J ≤ +125°C
Parameter
Condition
Feedback Voltage Reference
(±1%)
Feedback Voltage Reference
(±2%)
Feedback Voltage Reference
Feedback Bias Current
4.5V < V_IN < 32V, 0 < (V_CSH – V_OUT) < 60mV (±3%)
Output Voltage Range
Output Voltage Line Regulation
Output Voltage Load Regulation
Input and V_DD Supply
Quiescent Current
V_IN = 4.5V to 32V, V_CSH – V_OUT = 60mV
25mV < (V_CSH – V_OUT) < 60mV
excluding external MOSFET gate drive current
Shutdown Quiescent Current
Digital Supply Voltage (V_DD)
Undervoltage Lockout
Enable/UVLO
V_EN/UVLO = 0V
I_L = 0mA to 5mA
V_IN upper threshold (turn-on threshold)
V_IN lower threshold (turn-off threshold)
Enable Input Threshold
UVLO Threshold
Enable Input Current
Current Limit
V_EN/UVLO = 5V
Current Limit Threshold Voltage
Error Amplifier
(V_CSH – V_OUT)
Transconductance Error Amplifier GM
Oscillator Section
Oscillator Frequency
Maximum Duty Cycle
Minimum On-Time
Min
0.792
0.784
0.776
0.8
Typ
0.8
10
0.03
0.5
Max
0.808
0.816
0.824
6
Units
V
V
V
nA
V
%/V
%
1.6
2.5
mA
0.1
5
µA
4.7
5.0
5.3
V
4.25 4.4
V
3.95 4.1
V
0.6
1.1
1.6
V
2.2
2.5
2.8
V
0.1
5
µA
55
75
95
mV
0.2
mS
270 300 330 kHz
80
85
%
170 200
ns
November 2004
3
MIC2199