MIC2199_10 Datasheet, PDF (3/14 Pages) Micrel Semiconductor – 300kHz 4mm × 4mm Synchronous Buck Converter

Micrel, Inc.
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
MIC2199
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
Min Typ Max
Feedback Voltage Reference
(±1%)
0.792 0.8 0.808
Feedback Voltage Reference
(±2%)
0.784 0.816
Feedback Voltage Reference
Feedback Bias Current
4.5V < V_IN < 32V, 0 < (V_CSH – V_OUT) < 60mV (±3%)
0.776
10
0.824
Output Voltage Range
0.8
6
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
0.03
0.5
1.6
2.5
Shutdown Quiescent Current
Digital Supply Voltage (V_DD)
Undervoltage Lockout
Enable/UVLO
V_EN/UVLO = 0V
I_L = 0mA to 5mA
4.7
V_IN upper threshold (turn-on threshold)
V_IN lower threshold (turn-off threshold)
3.95
0.1
5
5.0
5.3
4.25 4.4
4.1
Enable Input Threshold
0.6
1.1
1.6
UVLO Threshold
2.2
2.5
2.8
Enable Input Current
Current Limit
V_EN/UVLO = 5V
0.1
5
Current Limit Threshold Voltage
Error Amplifier
(V_CSH – V_OUT)
55
75
95
Transconductance Error Amplifier GM
0.2
Oscillator Section
Oscillator Frequency
270 300 330
Maximum Duty Cycle
80
85
Minimum On-Time
170 200
Frequency Foldback Threshold measured at V_OUT pin
0.25
Foldback Frequency
0.40 0.55
75
Gate Drivers
Rise/Fall Time
Output Driver Impedance
C_L = 3000pF
source
60
5
8.5
sink
3.5
6
Driver Non-Overlap Time
80
Note 1.
Note 2.
Note 3.
Note 4.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Devices are ESD protected; however, handling precautions are recommended. Human body model, 1.5k in series with 100pF.
Specification for packaged product only.
Units
V
V
V
nA
V
%/V
%
mA
µA
V
V
V
V
V
µA
mV
mS
kHz
%
ns
V
kHz
ns
Ω
Ω
ns
January 2010
3
M9999-011310