EN6347QI
Electrical Characteristics
NOTE: VIN=6.6V over operating temperature range unless otherwise noted. Typical values are at TA = 25°C.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX UNITS
Operating Input Voltage
VIN
2.5
6.6
V
Under Voltage Lock-out –
VIN Rising
Voltage above which UVLO is not
asserted
VUVLOR
2.3
V
Under Voltage Lock-out –
VIN Falling
Voltage below which UVLO is
asserted
VUVLOF
2.075
100
V
Shut-Down Supply Current IS
ENABLE=0V
$A
$A
Operating Quiescent
IQ
LLM/SYNC = High
650
Current
Feedback Pin Voltage
EN6347QI
VFB
Feedback node voltage at:
0.7425
0.735
0.75
0.75
0.7575
0.765
V
EN6347QI3
VIN = 5V, ILOAD = 0, TA = 25°C
Feedback Pin Voltage
EN6347QI
Feedback node voltage at:
2.5V 0 VIN 0 6.6V
VFB
0.735
0.75
0.75
0.765
V
EN6347QI3
0A 0 ILOAD 0 4A, TA = -40 to 85°C
0.7275
0.7725
Feedback pin Input
IFB
VFB pin input leakage current
-5
5
nA
Leakage Current (Note 1)
Measured from when VIN > VUVLOR
ENABLE pin voltage crosses its
logic high threshold to when VOUT
reaches its final value. CSS = 15 nF
&
VOUT Rise Time (Note 1)
tRISE
0.9
10
1.2
1.5
68
ms
nF
Soft Start Capacitor Range CSS_RANGE
Output Drop Out
mV
VDO
RDO
VINMIN - VOUT at Full load
240
60
360
90
Voltage
Resistance (Note 1)
Input to Output Resistance
m%
PWM mode
0
4
4
Continuous Output Current IOUT
A
LLM mode (Note 2)
0.002
Over Current Trip Level
Disable Threshold
IOCP
VIN = 5V, VOUT = 1.2V
ENABLE pin logic low.
6.5
A
V
VDISABLE
0.0
1.8
0.6
VIN
ENABLE pin logic high
ENABLE Threshold
VENABLE
V
2.5V 0 VIN 0 6.6V
ENABLE Lockout Time
TENLOCKOUT
IENABLE
3.2
40
ms
$A
ENABLE pin Input Current
(Note 1)
ENABLE pin has ~180k% pull down
Switching Frequency (Free
Running)
Free Running frequency of
oscillator
FSW
3
MHz
MHz
V
External SYNC Clock
Frequency Lock Range
FPLL_LOCK
VSYNC_LO
VSYNC_HI
POK
Range of SYNC clock frequency
SYNC Clock Logic Level
2.7
1.8
3.3
0.8
2.5
SYNC Input Threshold –
Low (LLM/SYNC PIN)
SYNC Input Threshold –
High (LLM/SYNC PIN)
SYNC Clock Logic Level - (Note 3)
V
Threshold voltage as a fraction of
expected output voltage
POK Threshold
90
%
@Enpirion 2011 all rights reserved, E&OE
4
www.enpirion.com
05991
10/04/2011
Rev: B
ENPIRION [ ENPIRION, INC. ]
