MIC2164_10 Datasheet, PDF (4/39 Pages) Micrel Semiconductor – Synchronous Buck Controllers Featuring Adaptive On-Time Control 28V Input, Constant Frequency

Micrel, Inc.
MIC2164/-2/-3/C
Absolute Maximum Ratings⁽¹⁾
IN, FB, EN to GND .......................................... −0.3V to +6V
BST to LX ....................................................... −-0.3V to +6V
BST to GND .................................................. −0.3V to +37V
DH to LX............................................−0.3V to (V_BST + 0.3V)
DL, COMP to GND.............................. −0.3V to (V_IN + 0.3V)
HSD to GND.................................................... −0.3V to 31V
PGND to GND .............................................. −0.3V to +0.3V
Junction Temperature .............................................. +150°C
Storage Temperature (T_S).........................−65°C to +150°C
Lead Temperature (soldering, 10sec)........................ 260°C
Operating Ratings⁽²⁾
Input Voltage (V_IN)............................................ 3.0V to 5.5V
Supply Voltage (V_HSD) ....................................... 3.0V to 28V
Operating Temperature Range ................. −40°C to +125°C
Junction Temperature (T_J) ........................ −40°C to +125°C
Junction Thermal Resistance
MSOP (θ_JA) ..................................................130.5°C/W
Continuous Power Dissipation (T_A = 70°C)..............421mW
(derate 5.6mW/°C above 70°C)
Electrical Characteristics⁽⁴⁾
V_BST − V_LX = 5V; T_A = +25°C, unless noted. Bold values indicate −40°C ≤ T_J ≤ +125°C.
Parameter
Condition
Min.
General
Operating Input Voltage (V_IN) ⁽⁵⁾
3.0
HSD Voltage Range (V_HSD)
3.0
Quiescent Supply Current
(V_FB = 1.5V, output switching but excluding
external MOSFET gate current)
Standby Supply Current ⁽⁶⁾
V_IN = V_BST = 5.5V, V_HSD = 28, LX = unconnected,
EN = GND
Under-Voltage Lockout Trip Level
2.4
UVLO Hysteresis
DC-DC Controller
Output-Voltage Adjust Range
(V_OUT)
0.8
Error Amplifier
0°C ≤ T_J ≤ 85°C
-1
FB Regulation Voltage
−40°C ≤ T_J ≤ 125°C
-2
T_J = 25°C (MIC2164C)
-3
FB Input Leakage Current
V_FB = 0.8V
103
Current-Limit Threshold
V_FB = 0V
19
V_FB = 0.8V (MIC2164C)
95
V_FB = 0V (MIC2164C)
15
Soft-Start
Soft-Start Period
Oscillator
Switching Frequency ⁽⁸⁾
MIC2164C
MIC2164
MIC2164-2
MIC2164-3
0.202
0.225
0.45
0.75
Typ. Max. Units
5.5
V
28
V
1.4
3.0
mA
0.8
2
mA
2.7
3
V
50
mV
5.5
V
1
2
%
3
5
500
nA
130
162
48
77
mV
130
170
48
80
6
ms
0.27 0.338
0.3 0.375
0.6
0.75
1
1.25
MHz
September 2010
4
M9999-091310-D