sc286ultrt Semtech Corporation, sc286ultrt Datasheet - Page 3

• Manufacturer Part Number: sc286ultrt
• Description: Dual Channel 4a Synchronous Step-down Regulator
• Manufacturer: Semtech Corporation

Absolute Maximum Ratings
PVINA/B and AVINA/B Supply Voltages (V) . . . -0.3 to +6.0
LXA, LXB (V)
VOUTA, VOUTB (V) . . . . . . . . . . . . . . . . . . . -0.3 to AVIN + 0.3
CTLx
VOUTA, VOUTB Short Circuit Duration . . . . . . Continuous
ESD Protection Level
Exceeding the absolute maximum ratings may result in permanent damage to the device and/or device malfunction. Operation outside of the
parameters specified in the Electrical Characteristics section is not recommended.
Notes:
(1)
(2)
(3)
Electrical Characteristics
Unless specified: PVIN = AVIN = 5.0V, VOUT = 1.50V, C
T
A
Parameter
Under-Voltage Lockout
Output Voltage Tolerance
Current Limit
Supply Current
Shutdown Current
High Side Switch Resistance
Low Side Switch Resistance
L
= +25 °C.
X
Leakage Current
Due to parasitic board inductance, the transient LX pin voltage at the point of measurement may appear larger than that which exists on silicon. The device is
designed to tolerate the short duration transient voltages that will appear on the LX pin due to the deadtime diode conduction, for inductor currents up to the
current limit setting of the device.
Tested according to JEDEC standard JESD22-A114-B.
Calculated from package in still air, mounted to 3 x 4.5 (in), 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.
A
, CTLx
(1)
B
pins (V) . . . . . . . . . . . . . . . . -0.3 to AVIN + 0.3
. . . . . . . . . . . . . . . -0.3 to PVIN +0.3V, 6V Max
(2)
(2)
(1)
(kV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
(2)
(2)
Symbol
R
R
UVLO
ΔV
I
I
DSON_N
I
DSON_P
LK(LX)
SHDN
LIMIT
I
Q
OUT
IN
= 22µF, C
PVINA/B = AVINA/B = 5.5V; LXA/B = 5.0V; CTL3-0A/B =
PVINA/B = AVINA/B= 5.5V; LXA/B= 0V; CTL3-0A/B =
OUT
= 2 x 22µF; L = 1.0µH; -40°C≤ T
PVINA/B= AVINA/B= 2.9 to 5.5V; I
Rising AVINA/B; PVINA/B=AVINA/B
I
CTL3-0A/B = AGNDA/B
I
LXA/B
LXA./B
Peak LX current
= -100mA, T
= 100mA, T
Conditions
Hysteresis
I
AGNDA/B
AGNDA/B
OUTA/B
Recommended Operating Conditions
PVINA/B and AVINA/B Supply (V) . . . . . . . . . . 2.9 to +5.5
Maximum Output Current, Each Channel (A) . . . . . . . . .4.0
Input Capacitor, Each Channel (µF) . . . . . . . . . . . . . . . . . . 22
Output Capacitor, Each Channel (µF) . . . . . . 47 or 2 x 22
Output Inductor, Each Channel (µH) . . . . . . . . . . . . . . . 1.0
Thermal Information
Thermal Resistance, Junction to Ambient
Thermal Resistance, Junction to Case (°C/W) . . . . . . . . . . 7
Maximum Junction Temperature (°C) . . . . . . . . . . . . . . +150
Storage Temperature Range (°C) . . . . . . . . . . . -65 to +150
Peak IR Reflow Temperature (10s to 30s) (°C) . . . . . . +260
= 0A
J
J
= 25 °C
= 25 °C
J
≤ +125 °C; Per Channel Unless otherwise noted; Typical values are
OUT
=0A
-1.25
Min
2.70
-20
5.0
Typ
2.80
300
100
6.0
50
35
-1
1
1
(3)
+1.25
Max
(°C/W) . . 32.5
2.90
7.0
10
10
SC286
Units
mΩ
mV
µA
µA
µA
%
V
A
3