MIC24420 Datasheet, PDF (4/34 Pages) Micrel Semiconductor – 2.5A Dual Output PWM Synchronous Buck Regulator IC

Micrel, Inc.
MIC24420/MIC24421
Absolute Maximum Ratings⁽¹⁾
V_IN to PGND .................................................... –0.3V to 16V
V_IND1, V_IND2 to PGND........................................ –0.3V to 16V
V_DD 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 6V
V_BST1, V_BST2 to PGND................................. –0.3V to V_SW+6V
V_EN/DLY, V_COMP, V_FB, V_PG to PGND ....–0.7V to (V_AVDD + 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
ESD Rating ⁽³⁾ ................................................ ESD Sensitive
Operating Ratings⁽²⁾
Supply Voltage (V_IN)...................................... +4.5V to +15V
Output Voltage Range (V_OUT)……………......0.7V to 0.7*V_IN
Maximum Output Current (I_OUT)…………….. ................ 2.5A
Junction Temperature (T_J) ........................ –40°C to +125°C
Junction Thermal Resistance
4mmx4mm MLF-24L (θ_JC) .................................14°C/W
4mmx4mm MLF-24L (θ_JA) .................................35°C/W
Electrical Characteristics⁽⁴⁾
V_IN = 12V; 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)
4.5
Quiescent Supply Current
V_FB = 0.8V, I_OUT = 0A; Both outputs not switching
2.6
Shutdown Current
V_EN1 = V_EN2 = 0V
25
V_IN UVLO Turn-On Threshold
V_IN Rising, V_DD = V_IN
3.6
4.1
V_IN UVLO Hysteresis
V_DD = V_IN
400
VDD Supply
Internal Bias Voltages A_VDD
Reference (Each Channel)
V_FB = 0.8V, I_AVDD = 50mA
4.7
5.1
Feedback Reference Voltage
686 700
FB Bias Current
FB Line Regulation
Output Voltage Line Regulation
Output Voltage Load Regulation
Output Voltage Total Regulation
V_FB = 0.7V
V_IN = 6V to 15V, I_{OU T} = 10mA
V_IN = 6V to 15V , V_OUT = 1.8V, I_{OU T} = 1A; each channel
V_OUT = 1.8V, I_{OU T} = 0A to 2A; each channel
V_IN = 6V to 15V , I_{OU T} = 0.25A to 2A, V_OUT = 1.8V ; each
channel
5
0.005
0.005
0.15
0.1
External Current Sense, Adjustable
Current Limit Trip Point Current Sourcing current
175 200
Current Limit Temperature
Coefficient
T_J = -40°C to 125°C
750
Current Limit Comparator Offset
-20
0
Max
15
7
50
4.45
5.45
714
225
10
Units
V
mA
µA
V
mV
V
mV
nA
%/V
%/V
%
%
µA
ppm/°C
mV
June 2012
4
M9999-062012-C