MIC2101 Datasheet, PDF (4/37 Pages) Micrel Semiconductor – 38V, Synchronous Buck Controllers Featuring Adaptive On-Time Control

Micrel, Inc.
MIC2101/02
Absolute Maximum Ratings⁽¹⁾
V_IN ................................................................ 0.3V to +40V
V_DD, V_PVDD........................................................ 0.3V to +6V
V_SW, V_FREQ, V_ILIM, V_EN............................ 0.3V to (V_IN +0.3V)
V_BST to V_SW ........................................................ 0.3V to 6V
V_BST ................................................................ 0.3V to 46V
V_PG ..................................................... 0.3V to (V_DD + 0.3V)
V_FB ..................................................... 0.3V to (V_DD + 0.3V)
PGND to AGND ........................................... 0.3V to +0.3V
Junction Temperature .............................................. +150°C
Storage Temperature (T_S) ......................... 65C to +150C
Lead Temperature (soldering, 10s)............................ 260°C
ESD Rating⁽²⁾................................................. ESD Sensitive
Operating Ratings⁽³⁾
Supply Voltage (V_IN) .......................................... 4.5V to 38V
Enable Input (V_EN) .................................................. 0V to V_IN
V_SW, V_FREQ, V_ILIM, V_EN ............................................. 0V to V_IN
Junction Temperature (T_J) ........................ 40C to +125C
Junction Thermal Resistance
3mm x 3mm MLF-16 (_JA) ....................... 50.8°C/W
3mm x 3mm MLF-16 (_JC) ....................... 25.3°C/W
Electrical Characteristics⁽⁴⁾
V_IN = 12V, V_OUT =1.2V; V_BST – V_SW = 5V; T_A = 25°C, unless noted. Bold values indicate 40°C ≤ T_J ≤ +125°C.
Parameter
Condition
Min.
Typ.
Max.
Power Supply Input
Input Voltage Range (V_IN)⁽⁵⁾
4.5
38
Quiescent Supply Current (MIC2101) V_FB = 1.5V
400
750
Quiescent Supply Current (MIC2102) V_FB = 1.5V
2.1
3
Shutdown Supply Current
SW unconnected, V_EN = 0V
0.1
10
VDD Supply
VDD Output Voltage
VDD UVLO Threshold
VDD UVLO Hysteresis
Load Regulation
Reference
Feedback Reference Voltage
FB Bias Current
Enable Control
EN Logic Level High
EN Logic Level Low
EN Hysteresis
EN Bias Current
Oscillator
Switching Frequency
Maximum Duty Cycle
Minimum Duty Cycle
Minimum Off-Time
V_IN = 7V to 38V, I_DD = 10mA
4.8
5.2
V_DD rising
3.8
4.2
400
I_DD = 0 to 40mA
0.6
2
T_J = 25°C (±1.0%)
0.792
0.8
40°C ≤ T_J ≤ 125°C (±2%)
0.784
0.8
V_FB = 0.8V
5
1.8
200
V_EN = 12V
6
V_FREQ = V_IN
V_FREQ = 50%V_IN
V_FB > 0.8V
400
600
300
85
0
140
200
5.4
4.6
3.6
0.808
0.816
500
0.6
30
750
260
Units
V
µA
mA
µA
V
V
mV
%
V
nA
V
V
mV
µA
kHz
%
%
ns
August 2012
4
M9999-080712-A