sc1155csw.tr Semtech Corporation, sc1155csw.tr Datasheet - Page 4

• Manufacturer Part Number: sc1155csw.tr
• Description: Programmable Synchronous Dc/dc Hysteretic Controller With Vrm 9.0 Vid Range
• Manufacturer: Semtech Corporation

PRELIMINARY - August 7, 2000
ELECTRICAL CHARACTERISTICS
Unless specified: 0 < T
PARAMETER
Supply Voltage Range
Supply Current (Quiescent)
High Side Driver Supply
Current (Quiescent)
REFERENCE/VOLTAGE IDENTIFICATION
Reference Voltage Accuracy
VID0 - VID4 High Threshold
Voltage
VID0 - VID4 Low Threshold
Voltage
POWER GOOD
Undervoltage Threshold
Output Saturation Voltage
Hysteresis
OVER VOLTAGE PROTECTION
OVP Trip Point
Hysteresis
SOFT START
Charge Current
Discharge Current
INHIBIT COMPARATOR
Start Threshold
VIN12V UVLO
Start Threshold
Hysteresis
© 2000 SEMTECH CORP.
(1)
J
< 125°C, VIN = 12V
SYMBO
V
V
Vstart
Vhys
V
Vstart
VIN12V
Idischg
HYS(PWRG
TH(PWRGD)
I
V
V
HYS(OVP)
BOOT
V
V
V
I
I
CHG
TH(H)
TH(L)
IN
L
D)
OVP
REF
SAT
q
UVLO
UVLO
q
INH
INH = 5V, VID not 11111,
VIN above UVLO threshold during start-up,
f
C
INH = 0V or VID = 11111 or VIN below
UVLO threshold during start-up,
BOOT = 13V, BOOTLO = 0V
INH = 5V, VID not 11111, VIN
f
C
11.4V < VIN12V < 12.6V, over full VID
range (see Output Voltage Table)
I
V
AGND = 20k , V
Note: I
V
SW
above UVLO threshold during start-up,
SW
O
SS
(S/S)
DH
DH
= 5mA
PROGRAMMABLE SYNCHRONOUS
DC/DC HYSTERETIC CONTROLLER
WITH VRM 9.0 VID RANGE
= 200kHz, BOOTLO = 0V,
= 200kHz, BOOT = 13V, BOOTLO = 0V,
= 0.5V, resistance from VREFB pin to
= C
= 50pF
= 1V
CHG
DL
= 50pF
= (I
VREFB
CONDITIONS
REFB
/ 5)
= 1.3V
11.4
2.25
10.4
9.25
MIN TYP MAX UNITS
1.8
90
38
-1
1
0.5
2.0
12
15
10
42
10
13
10
5
1
2
10.75
15.6
2.4
2.2
13
10
95
46
1
1
SC1155
% V
%V
mA
mA
mV
mV
mA
µA
µA
%
V
V
V
V
V
V
V
OUT
REF
4