SC1189_07 Datasheet, PDF (3/16 Pages) Semtech Corporation – Programmable Synchronous DC/DC Converter, Dual LDO Controller

SC1189
POWER MANAGEMENT
Electrical Characteristics (Cont.)
Unless specified: V_CC = 4.75V to 5.25V; GND = P_GND = 0V; V_OSENSE = V_O; 0mV < (CS+-CS-) < 60mV; LDOV = 11.4V to 12.6V; T_A = 0 to 70°C
Parameter
Conditions
Min
Typ
Max
Units
Linear Sections
Quiescent Current
LDOV = 12V
5
mA
Output Voltage LDO1
2.487 2.525
2.563
V
Output Voltage LDO2
1.231 1.250
1.269
V
Gain (A_OL)
Load Regulation
Line Regulation
LDOS (1,2) to GATE (1,2)
I_O = 0 to 8A
90
dB
0.3
%
0.3
%
Output Impedance
LDOV Undervoltage Lockout
VGATE = 6.5V
1
6.5
8.0
1.5
kΩ
10
V
LDOEN Threshold
1.3
1.9
V
LDOEN Sink Current
LDOEN = 3.3V
LDOEN = 0V
0.01
1.0
µA
-200
-300
µA
Overcurrent Trip Voltage
% of Vo set point
20
40
60
%
Power-up Output Short Circuit Immunity
1
5
60
ms
Output Short Circuit Glitch Immunity
0.5
4
30
ms
Gate Pulldown Impedance
GATE (1,2) -AGND;
VCC+BST=0V
80
300
750
kΩ
VOSENSE Impedance
10
kΩ
Notes:
(1) This device is ESD sensitive. Use of standard ESD handling precautions is required.
(2) See Gate Resistor Selection recommendations.
 2007 Semtech Corp.
3
www.semtech.com