MIC2182 Datasheet, PDF (4/28 Pages) Micrel Semiconductor – High-Efficiency Synchronous Buck Controller Final Information

MIC2182
Micrel
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
Sync Pin Voltage (V_SYNC) ................................ 7V to –0.3V
Enable Pin Voltage (V_EN/UVLO) ...................................... V_IN
Power Dissipation (P_D)
SOP ................................................ 400mW @ T_A= 85°C
SSOP ............................................. 270mW @ T_A= 85°C
Ambient Storage Temperature (T_S) ......... –65°C to +150°C
ESD, Note 3
Electrical Characteristics
Operating Ratings (Note 2)
Analog Supply Voltage (V_IN) ........................ +4.5V to +32V
Ambient Temperature (T_A) ......................... –40°C to +85°C
Junction Temperature (T_J) ....................... –40°C to +125°C
Package Thermal Resistance
SOP (θ_JA) .......................................................... 100°C/W
SSOP (θ_JA) ........................................................ 150°C/W
V_IN = 15V; SS = open; V_PWM = 0V; V_SHDN = 5V; I_LOAD = 0.1A; T_A = 25°C, bold values indicate –40°C ≤ T_A ≤ +85°C; Note 4; unless
noted
Parameter
Condition
Min Typ Max Units
MIC2182 [Adjustable], (Note 5)
Feedback Voltage Reference
1.233 1.245 1.257 V
Feedback Voltage Reference
1.220 1.245 1.270 V
Feedback Voltage Reference
Feedback Bias Current
4.5V < V_IN < 32V, 0 < V_CSH – V_OUT < 75mV
1.208 1.245 1.282 V
10
nA
Output Voltage Range
1.25
6
V
Output Voltage Line Regulation V_IN = 4.5V to 32V, V_CSH – V_OUT = 50mV
0.03
%/V
Output Voltage Load Regulation 25mV < (V_CSH – V_OUT) < 75mV (PWM mode only)
0.5
%
Output Voltage Total Regulation 0mV < (V_CSH – V_OUT) < 75mV (full load range) 4.5V < V_IN < 32V
0.6
%
MIC2182-3.3
Output Voltage
3.267 3.3 3.333 V
Output Voltage
3.234 3.3 3.366 V
Output Voltage
4.5V < V_IN < 32V, 0 < V_CSH – V_OUT < 75mV
3.201 3.3 3.399 V
Output Voltage Line Regulation V_IN = 4.5V to 32V, V_CSH – V_OUT = 50mV
0.03
%/V
Output Voltage Load Regulation 25mV < (V_CSH – V_OUT) < 75mV (PWM mode only)
0.5
%
Output Voltage Total Regulation 0mV < (V_CSH – V_OUT) < 75mV (full load range) 4.5V < V_IN < 32V
0.8
%
MIC2182-5.0
Output Voltage
4.95 5.0 5.05
V
Output Voltage
4.90 5.0 5.10
V
Output Voltage
Output Voltage Line Regulation
Output Voltage Load Regulation
Output Voltage Total Regulation
Input and VDD Supply
6.5V < V_IN < 32V, 0 < V_CSH – V_OUT < 75mV
V_IN = 6.5V to 32V, V_CSH – V_OUT = 50mV
25mV < (V_CSH – V_OUT) < 75mV (PWM mode only)
0mV < (V_CSH – V_OUT) < 75mV (full load range) 6.5V < V_IN < 32V
4.85
5.0 5.150 V
0.03
%/V
0.5
%
0.8
%
PWM Mode
Skip Mode
Shutdown Quiescent Current
Digital Supply Voltage (V_DD)
Undervoltage Lockout
V_PWM = 0V, excluding external MOSFET gate drive current
I_L = 0mA, V_PWM floating (1nF capacitor to ground)
V_EN/UVLO = 0V
I_L = 0mA to 5mA
V_DD upper threshold (turn on threshold)
V_DD lower threshold (turn off threshold)
1.6
2.5
mA
600 1500 µA
0.1
5
µA
4.7
5.3
V
4.2
V
4.1
V
MIC2182
4
June 2000