MIC2183 Micrel, Inc.
M9999-042205 4 April 2005
Electrical Characteristics
V
IN
A = V
IN
P = V
CSH
= 5V, V
OUT
= 3.3V, V
EN/UVLO
= 5V, V
FREQ/2
= 0V, T
J
= 25ºC, unless otherwise specified. Bold values indicate
–40ºC < T
J
< +125ºC.
Parameter Condition Min Typ Max Units
Regulation
Feedback Voltage Reference (±1%) 1.233 1.245 1.257 V
(±2%) 1.22 1.27 V
Feedback Bias Current 50 nA
Output Voltage Line Regulation 5V ≤ V
IN
≤ 12V 0.04 % / V
Output Voltage Load Regulation 0mV < (V
CSH
– V
CSL
) < 75mV 0.9 %
Output Voltage Total Regulation 5V ≤ V
IN
A ≤ 12V, 0mV < (V
CSH
– V
CSL
) < 75mV (±3%) 1.208 1.282 V
Input & V
DD
Supply
V
IN
A Input Current 0.7 mA
V
IN
P Input Current, Note 4 (Excluding external MOSFET gate current) 1.0 mA
Shutdown Quiescent Current V
EN/UVLO
= 0V; (I
VINA
+ I
VINP
) 0.5 5 µA
Digital Supply Voltage (V
DD
)I
L
= 0 2.82 3.0 3.18 V
Digital Supply load regulation I
L
= 0 to 1mA 0.03 V
Undervoltage Lockout V
DD
upper threshold (turn on threshold) 2.75 V
UVLO Hysteresis 100 mV
Enable/UVLO
Enable Input Threshold 0.6 0.9 1.2 V
UVLO Threshold (turn-on threshold) 1.4 1.5 1.6 V
UVLO Hysteresis 140 mV
Enable Input Current V
EN/UVLO
= 5V 0.2 5 µA
Soft Start
Soft Start Current 5 µA
Current Limit
Current Limit Threshold Voltage Voltage on CSH-CSL to trip current limit 100 mV
Error Amplifier
Error Amplifier Gain 20 V/V
Current Amplifier
Current Amplifier Gain 3.0 V/V
Absolute Maximum Ratings (Note 1)
Supply Voltage (V
IN
A, V
IN
P) ......................................... 15V
Digital Supply Voltage (V
DD
) ........................................... 7V
Comp Pin Voltage (V
COMP
) ............................ –0.3V to +3V
Feedback Pin Voltage (V
FB
) .......................... –0.3V to +3V
Enable Pin Voltage (V
EN/UVLO
) ..................... –0.3V to 15V
Current Sense Voltage (V
CSH
–V
CSL
) ............... –0.3V to 1V
Sync Pin Voltage (V
SYNC
) ................................ –0.3V to 7V
Freq/2 Pin Voltage (V
FREQ/2
) ............................ -0.3V to 7V
Power Dissipation (P
D
)
16 lead SOIC ................................. 400mW @ T
A
= 85°C
16 lead QSOP ....................................... 245mW @ 85°C
Ambient Storage Temp ............................ –65°C to +150°C
ESD Rating, Note 3
Operating Ratings (Note 2)
Supply Voltage (V
IN
A, V
IN
P) ........................ +2.9V to +14V
Ambient Operating Temperature......... –40°C ≤ T
A
≤ +85°C
Junction Temperature ....................... –40°C ≤ T
J
≤ +125°C
Output Voltage Range...................................... 1.3V to 12V
PackageThermal Resistance
θ
JA
16-lead SOP ............................................... 100°C/W
θ
JA
16-lead QSOP ............................................. 163°C/W
