MIC2159 Datasheet, PDF (3/17 Pages) Micrel Semiconductor – SYNCHRONOUS-itty™ Step-Down Converter IC

Micrel
MIC2159
Absolute Maximum Rating⁽¹⁾
Supply Voltage (V_IN) ....................................................15.5V
Booststrapped Voltage (V_BST) .................................. V_IN +5V
Junction Temperature Range.............. –40°C ≤ T_J ≤ +125°C
Ambient Storage Temp .............................–65°C to +150°C
Operating Ratings⁽²⁾
Supply Voltage.............................................. +3V to +14.5V
Output Voltage Range ................................0.8V to V_IN*D_MAX
Package Thermal Resistance
θ_JA 10-lead ePAD MSOP................................... 63°C/W
Electrical Characteristics
Tj = 25ºC, bold values indicate -40ºC<Tj<+125ºC; Vin = 5V; unless otherwise specified
Parameter
Condition
Min
Regulation
Feedback Voltage
Reference
Feedback Voltage
Reference
(+/- 1%)
(+/- 2% over temp)
0.792
0.784
Feedback Bias Current
Output Voltage Line
Regulation
Output Voltage Load
Regulation
Output Voltage Total
Regulation
Oscillator Section
3V ≤ VIN ≤ 14.5V; 1A ≤ IOUT ≤ 10A
(VOUT = 2.5V) Note 3
Oscillator Frequency
350
Maximum Duty Cycle
92
Minimum On-Time
Note 3
Input and VDD Supply
PWM mode supply
current
V_CS/EN =Vin- 0.25V; V_FB = 0.7V
(output switching but excluding external MOSFET gate
current.)
Shutdown Quiescent
Current (MSOP-10)
V_COMP = 0V
V_COMP Shutdown
Threshold (MSOP-10)
0.1
V_COMP Shutdown
Blanking Period (MSOP-
1
10)
Digital Supply Voltage
V_IN >6V
4.7
(V_DD)
Error Amplifier
DC Gain
Transconductance
Soft Start
Soft Start Current
After time out of internal timer
-13
Current Sense
Current Sense Over
135
Current Trip Point
Typ Max Units
0.8 0.808
V
0.8 0.816
V
150
350
nA
0.03
%/V
0.5
%
0.6
1.5
%
400
450
kHz
%
30
60
ns
1.6
3
mA
50
150
µA
0.25 0.35
V
4
8
ms
5
5.3
V
70
dB
1.4
mS
9
-4
µA
200
275
µA
October 2006
3
M9999-101206