EL7512C Elantec Semiconductor, EL7512C Datasheet - Page 2

• Manufacturer Part Number: EL7512C
• Description: High Frequency PWM Step-Up Regulator
• Manufacturer: Elantec Semiconductor

EL7512C - Preliminary
High Frequency PWM Step-Up Regulator
Absolute Maximum Ratings
Values beyond absolute maximum ratings can cause the device to be pre-
maturely damaged. Absolute maximum ratings are stress ratings only
and functional device operation is not implied
V
Important Note:
All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are at the
specified temperature and are pulsed tests, therefore: T
Electrical Characteristics
V
Pin Descriptions
IQ1
IQ2
VFB
IB
V
D
I
I
V
V
I
R
I
F
F
VHI-SHDN
VLO-SHDN
IN
IN
LIM
SHDN
LEAK-LBO
LEAK-SWITCH
V
V
OSC-RANGE
OSC1
DS-ON
Parameter
IN
MAX
LBI
OL-LBO
Pin Number
, LBI, V
OUT
OUT
= 5V, V
10
/ V
/ I
1
2
3
4
5
6
7
8
9
OUT
DD
IN
OUT
= 12V, I
Quiescent Current - Shut-down
Quiensent Current
Feedback Voltage
Feedback Input Bias Current
Input Voltage Range
Maximum Duty Cycle
Current limit - Max Average Input Current
Shut-down Input Bias Current
LBI Threshold Voltage
LBO Output Low
LBO Output Leakage Current
Switch On Resistance
Switch Leakage Current
Line Regulation
Load Regulation
Frequency Range
Switching Frequency
SHDN Input High Threshold
SHDN Input Low Threshold
Pin Name
PGND
SGND
OUT
VDD
LBO
LBI
RT
EN
FB
LX
SS
= 0mA, F
Description
Power ground; connected to the source of internal N-channel power MOSFET
Signal ground; ground reference for all the control circuitry; needs to have only a single connection to PGND
Timing resister to adjust the oscillation frequency of the converter
Chip enable; connects to logic HI (>1.6V) for chip to function
Low battery input; connects to a sensing voltage, or left open if function is not used
Low battery detection output; connected to the open drain of a MOSFET; able to sink 1mA current
Soft-start; connects to a capacitor to control the start of the converter
Voltage feedback input; needs to connect to resistor divider to decide V
Control circuit positive supply
Inductor drive pin; connected to the drain of internal N-channel power MOSFET
OSC
= 600kHz, T
(T
A
J
A
= 25°C)
= T
= 25°C unless otherwise specified.
C
= T
VSHDN = 0V
VSHDN = 2V, Frequency = 600kHz
ILBO = 1mA
VLBI = 250mV, VLBO = 5V
at 12V output
3V < V
I
R
OUT
OSC
A
+18V
< 250µA
= 100k
IN
< 6V, V
2
LX Voltage
Storage Temperature
Operating Temperature
Lead Temperature
OUT
Condition
= 12V, no load
Pin Function
O
1000
Min
1.31
190
530
1.6
84
2
1250
Typ
1.35
0.02
220
300
670
2.5
0.1
0.5
90
Max
1500
1200
1.39
0.10
0.15
250
800
0.2
0.5
3
4
1
1
1
1
-65°C to +150°C
-40°C to +85°C
Unit
%/V
kHz
kHz
mA
mA
mV
m
µA
µA
µA
µA
µA
%
%
300°C
V
V
V
V
V
20V