MIC25400 Datasheet, PDF (4/27 Pages) Micrel Semiconductor – 2A Dual Output PWM Synchronous Buck Regulator IC

Micrel, Inc.
MIC25400
Absolute Maximum Ratings⁽¹⁾
V_IN to PGND .................................................... –0.3V to 16V
V_IND1, V_IND2 to PGND........................................ –0.3V to 16V
V_PVDD to PGND .................................................. –0.3V to 6V
V_SW1, V_SW2 to PGND ............................ –0.7V to (V_IN + 0.3V)
V_CS1, V_CS2 to PGND ............................. –0.7V to (V_IN + 0.3V)
V_BST1 to V_SW1, V_BST2 to V_SW2............................ –0.3V to 6.0V
V_BST1, V_BST2 to PGND....................................... –0.3V to 22V
V_EN/DLY1, V_EN/DLY2 to PGND...............–0.7V to (V_PVDD + 0.3V)
V_COMP1, V_COMP2 to PGND..................–0.7V to (V_PVDD + 0.3V)
V_FB1, V_FB2 to PGND..........................–0.7V to (V_PVDD + 0.3V)
V_PG1, V_PG2 to PGND .........................–0.7V to (V_PVDD + 0.3V)
PGND1, PGND2 to AGND ........................... –0.3V to +0.3V
Junction Temperature ................................................ 150°C
Storage Temperature ...............................–65°C to +150°C
Lead Temperature (soldering,10 sec.)....................... 260°C
Operating Ratings⁽²⁾
Supply Voltage (V_IN)................................... +4.5V to +13.2V
Output Voltage Range (V_OUT)……………......0.7V to 0.7*V_IN
Maximum Output Current (I_OUT)…………….. ................... 2A
Junction Temperature (T_J) ........................ –40°C to +125°C
Junction Thermal Resistance
4mm x 4mm MLF-24L (θ_JA) ...............................35°C/W
Electrical Characteristics⁽⁴⁾
V_IN = 12; V_EN=5V; V_OUT=1.8V; I_LOAD=10mA; T_A = 25°C, bold values indicate –40°C≤ T_J ≤ +125°C, unless noted.
Parameter
Condition
Min Typ
Power Input Supply
Input Voltage Range (V_IN)
Quiescent Supply Current
Shutdown Current
V_IN UVLO Threshold
V_IN UVLO Hysteresis
V_IN UVLO V_IN <6V)
VDD Supply
V_FB = 0.8V, I_OUT = 0A; Both outputs not switching
V_EN1 = V_EN2 = 0V
V_IN Rising, P_VDD open, for V_IN≥6V
V_IN ≥ 6V
V_IN Rising, P_VDD connected to V_IN, for V_IN<6V
4.5
3.6
360
3.6 4.02
150
3.2
3.5
Internal Bias Voltages P_VDD
Reference (Each Channel)
V_FB = 0.8V, I_PVDD = 75mA
4.7
5.1
Feedback Reference Voltage ±2% over temperature
FB Bias Current
V_FB = 0.7V
FB Line Regulation
V_IN = 6V to 13.2V, I_{OU T} = 10mA
Output Voltage Line Regulation V_IN = 6V to 13.2V , V_OUT = 1.8V, I_{OU T} = 1A
Output Voltage Load Regulation V_OUT = 1.8V, I_{OU T} = 0A to 2A
Output Voltage Total Regulation V_IN = 6V to 13.2V , I_{OU T} = 0.25A to 2A, V_OUT = 1.8V
External Current Sense, Adjustable
686 700
5
0.005
0.005
0.15
0.1
Current Limit Trip Point Current
Current Limit Temperature
Coefficient
Current Limit Comparator Offset
Sourcing current
175 200
750
-10
0
Max
13.2
7
425
4.5
3.9
5.4
714
225
10
Units
V
mA
µA
V
mV
V
V
mV
nA
%/V
%/V
%
%
µA
ppm/°C
mV
January 2011
4
M9999-020111-C