SC1186 Datasheet, PDF (3/12 Pages) Semtech Corporation – PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER, DUAL LOW DROPOUT REGULATOR CONTROLLER

PROGRAMMABLE SYNCHRONOUS DC/DC
CONVERTER, DUAL LOW DROPOUT
REGULATOR CONTROLLER
SC1186
PRELIMINARY - December 2, 1999
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
LDOV Undervoltage Lockout
6.5 8.0 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
6
ms
Gate Pulldown Impedance
GATE(1,2)-AGND;VCC=BST=0V
80 300 750 kΩ
VOSENSE Impedance
10
kΩ
PIN DESCRIPTION
Pin Pin Name
1 AGND
2 GATE1
3 LDOS1
4 LDOS2
5 VCC
6 REF
7 LDOEN
8 CS-
9 CS+
10 PGNDH
11 DH
12 PGNDL
13 DL
14 BSTL
15 BSTH
16 EN⁽¹⁾
17 VOSENSE
18 _VID4⁽¹⁾
19 _VID3⁽¹⁾
20 _VID2⁽¹⁾
21 _VID1⁽¹⁾
22 _VID0⁽¹⁾
23 LDOV
24 GATE2
Pin Function
Small Signal Analog and Digital Ground
Gate Drive Output LDO1
Sense Input for LDO1
Sense Input for LDO2
Input Voltage
Buffered Reference Voltage output
LDO Supply Monitor.
Current Sense Input (negative)
Current Sense Input (positive)
Power Ground for High Side Switch
High Side Driver Output
Power Ground for Low Side Switch
Low Side Driver Output
Supply for Low Side Driver
Supply for High Side Driver
Logic low shuts down the converter;
High or open for normal operation.
Top end of internal feedback chain
Programming Input (MSB)
Programming Input
Programming Input
Programming Input
Programming Input (LSB)
+12V for LDO section
Gate Drive Output LDO2
Top View
AGND
1
GATE1
2
LDOS1
3
LDOS2
4
VCC
5
REF
6
LDOEN
7
CS-
8
CS+
9
PGNDH 10
DH 11
PGNDL 12
24
GATE2
23
LDOV
22
VID0
21
VID1
20
VID2
19
VID3
18
VID4
17
VOSENSE
16
EN
15
BSTH
14
BSTL
13
DL
(24 Pin SOIC)
Note:
(1) All logic level inputs and outputs are open
collector TTL compatible.
© 1999 SEMTECH CORP.
3
652 MITCHELL ROAD NEWBURY PARK CA 91320