SC1146 Datasheet, PDF (3/10 Pages) Semtech Corporation – VRM9.0 PROGRAMMABLE, MULTI-PHASE, HIGH PERFORMANCE PWM CONTROLLER

VRM9.0 PROGRAMMABLE, MULTI-PHASE,
HIGH PERFORMANCE PWM CONTROLLER
SC1146
July 25, 2000
ELECTRICAL CHARACTERISTICS (Cont.)
Unless otherwise noted: T_A = 25°C, V_CC5V = 5V, V_CC2 = 5V, 4-Phase operation.
PARAMETER
SYMBOL
CONDITIONS
Bgout Voltage
Bgout Impedance
External Clock Freq. Range
Oscillator Frequency
Internal Clock Freq. Range
Match DRV0-3
PWM Off Time
V_Bgout
R_{O_Bg}
F_{ext_CK}
F_OSC
F_{int_CK}
∆=_D
Toff
Vid = 00000
Iref = 250µA
Duty cycle (Avg) = 50%
MIN TYP MAX UNITS
TBD 1.30 TBD V
3
KΩ
.80 8.0 8.5 MHz
7.6 8.0 8.4 MHz
.80 8.0 8.5 MHz
-1
+1
%
25
%
Overcurrent Comparator,
Comparator, Common Mode
Range
OC+I/P bias Current
OCC_CMR
IB_OC+
Vin = 5V
OC-I/P bias Current
IB_OC-
Vin = 5V
Input Offset Voltage
Feedback Input Impedance
Duty Cycle Range
VOS_OCC
Ri_FB
D
Vin = 5V
V_O = 2.00V
CONVERTER SPECIFICATIONS, Reference Application Circuit
Output Accuracy Over Set
Range
Load Regulation
Line Regulation
POWER GOOD SIGNAL
V_OUT
∆V_OUT
∆I_O
∆V_OUT
∆V_IN
VID 0-4 = 0000-1111
V_CC5V = 5.0V
V_O = 2.000V
I_O = 3A - 20A
V_CC5V = 5V, V_O = 2.000V
V_IN = 4-6V, (V_IN separated from
Vcc5v) I_O = 5A , Clk = external
Off Leakage Current
I_{leakage_Off}
PWRGOOD = Logic High
Power Good Max Sink Current I_{Sink_Max}
PWRGOOD< = .8V
Power Good Threshold
P_{wrgood_T_lo}
Vout = 1.300V - 1.950V
Voltage Tolerance
P_{wrgood_T_Hi}
Vout = 2.000V - 3.500V
3
15
V
+75
+250 µΑ
+75
+250 µΑ
10
mV
12
ΚΩ
0
75
%
-1
+1
%
.025 .05 %/A
%/V
.15
2
µA
2
mA
+100
mV
+150
mV
Note:
(1) This device is ESD sensitive. Use of standard ESD handling precautions is required.
The SC1146 is patent pending
© 2000 SEMTECH CORP.
3
652 MITCHELL ROAD NEWBURY PARK CA 91320