MIC2570_11 Datasheet, PDF (3/15 Pages) MIC GROUP RECTIFIERS – Two-Cell Switching Regulator

MIC2570
Absolute Maximum Ratings
Supply Voltage (V_IN)...................................................... 18V
Switch Voltage (V_SW) .................................................... 36V
Switch Current (I_SW) ........................................................ 1A
Sync Voltage (V_SYNC)......................................–0.3V to 15V
Storage Temperature (T_A)......................... –65°C to +150°C
SOIC Power Dissipation (P_D) .................................. 400mW
Micrel, Inc.
Operating Ratings
Supply Voltage (V_IN)..................................... +1.3V to +15V
Ambient Operating Temperature (T_A) ......... –40°C to +85°C
Junction Temperature (T_J) ........................ –40°C to +125°C
SOIC Thermal Resistance (θ_JA) ............................ 140°C/W
Electrical Characteristics
V_IN = 2.5V; T_A = 25°C, bold indicates –40°C ≤ T_A ≤ 85°C; unless noted
Parameter
Condition
Input Voltage
Quiescent Current
Startup guaranteed, I_SW = 100mA
Output switch off
Fixed Feedback Voltage
Reference Voltage
Comparator Hysteresis
MIC2570-1; V_{2.85V pin} = V_OUT, I_SW = 100mA
MIC2570-1; V_{3.3V pin} = V_OUT, I_SW = 100mA
MIC2570-1; V_{5V pin} = V_OUT, I_SW = 100mA
MIC2570-2, [adj. voltage versions], I_SW = 100mA, Note 1
MIC2570-2, [adj. voltage versions]
Output Hysteresis
Feedback Current
Reference Line Regulation
Switch Saturation Voltage
Switch Leakage Current
Oscillator Frequency
Maximum Output Voltage
MIC2570-1; V_{2.85V pin} = V_OUT, I_SW = 100mA
MIC2570-1; V_{3.3V pin} = V_OUT, I_SW = 100mA
MIC2570-1; V_{5V pin} = V_OUT, I_SW = 100mA
MIC2570-1; V_{2.85V pin} = V_OUT
MIC2570-1; V_{3.3V pin} = V_OUT
MIC2570-1; V_{5V pin} = V_OUT
MIC2570-2 [adj. voltage versions]; V_FB = 0V
1.5V ≤ V_IN ≤ 15V
V_IN = 1.3V, I_SW = 300mA
V_IN = 1.5V, I_SW = 800mA
V_IN = 3.0V, I_SW = 800mA
Output switch off, V_SW = 36V
MIC2570-1, -2; I_SW = 100mA
Sync Threshold Voltage
Switch On-Time
Currrent Limit
Duty Cycle
V_FB < V_REF, I_SW = 100mA
General Note: Devices are ESD protected; however, handling precautions are recommended.
Note 1: Measured using comparator trip point.
Min Typ Max Units
1.3
15
V
130
µA
2.7 2.85 3.0
V
3.14 3.30 3.47
V
4.75 5.00 5.25
V
208 220 232 mV
6
mV
65
mV
75
mV
120
mV
6
µA
6
µA
6
µA
25
nA
0.35
%/V
250
mV
450
mV
450
mV
1
µA
20
kHz
36
V
0.7
V
35
µs
1.1
A
67
%
August 2007
3
MIC2570