MIC28500 Datasheet, PDF (4/29 Pages) Micrel Semiconductor – 75V/4A Hyper Speed Control™ Synchronous DC-DC Buck Regulator

Micrel, Inc.
MIC28500
Absolute Maximum Ratings^{(1, 2)}
PV_IN to PGND................................................ −0.3V to +76V
FS to PGND ....................................................−0.3V to PV_IN
PV_DD, V_DD to PGND ......................................... −0.3V to +6V
V_SW, V_CS to PGND .............................. −0.3V to (PV_IN +0.3V)
V_BST to V_SW ........................................................ −0.3V to 6V
V_BST to PGND .................................................. −0.3V to 82V
V_EN to PGND ...................................... −0.3V to (V_DD + 0.3V)
V_FB to PGND....................................... −0.3V to (V_DD + 0.3V)
PGND to SGND ........................................... −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⁽³⁾
Supply Voltage (PV_IN) ........................................ 30V to 75V
Bias Voltage (PV_DD, V_DD).................................. 4.5V to 5.5V
Enable Input (V_EN) ................................................. 0V to V_DD
Junction Temperature (T_J) ........................ −40°C to +125°C
Maximum Power Dissipation......................................Note 4
Package Thermal Resistance⁽⁴⁾
5mm x 6mm MLF^® (θ_JA) ....................................36°C/W
Electrical Characteristics⁽⁵⁾
PV_IN = V_FS = 48V, V_DD = 5V; V_BST – V_SW = 5V; T_A = 25°C, unless noted. Bold values indicate −40°C ≤ T_J ≤ +125°C.
Parameter
Condition
Min.
Typ.
Power Supply Input
Input Voltage Range ( PV_IN)
30
FS Voltage Range
2
V_DD Bias Voltage
Operating Bias Voltage (V_DD)
4.5
Under-Voltage Lockout Trip Level V_DD Rising
3.2
UVLO Hysteresis
Quiescent Supply Current (I_VDD)
V_FB = 1.5V
Shutdown Supply Current (I_VDD)
V_DD = V_BST = 5.5V, V_IN = 48V
SW = unconnected, V_EN = 0V
Reference
Feedback Reference Voltage
0°C ≤ T_J ≤ 85°C (±1.0%)
−40°C ≤ T_J ≤ 125°C (±1.5%)
0.792
0.788
Load Regulation
I_OUT = 0A to 4A
Line Regulation
PV_IN = 30 to 75V
FB Bias Current
V_FB = 0.8V
-0.5
Enable Control
EN Logic Level High
4.5V < V_DD < 5.5V
1.2
EN Logic Level Low
4.5V < V_DD < 5.5V
EN Bias Current
V_EN = 0V
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
3. The device is not guaranteed to function outside operating range.
4. PD_(MAX) = (T_J(MAX) – T_A)/ θ_JA, where θ_JA depends upon the printed circuit layout. See “Applications Information.”
5. Specification for packaged product only.
5
3.85
380
1.4
0.7
0.8
0.8
0.04
0.1
0.005
0.85
0.78
50
Max.
75
75
5.5
4.45
3
2
0.808
0.812
0.5
0.4
100
Units
V
V
V
V
mV
mA
mA
V
%
%
µA
V
V
µA
June 2011
4
M9999-060311-B