EN2340QI Datasheet, PDF (5/20 Pages) Enpirion, Inc. – 204A Voltage Mode Synchronous Buck PWM

EN2340QI
Electrical Characteristics
NOTE: V_IN=12V, Minimum and Maximum values are over operating ambient temperature range unless otherwise noted.
Typical values are at T_A = 25°C.
PARAMETER
SYMBOL
Operating Input Voltage
PVIN
TEST CONDITIONS
MIN TYP MAX UNITS
4.5
14.0
V
Controller Input Voltage
AVIN
2.5
5.5
V
AVIN Under Voltage
Lock-Out Rising
AVIN_UVLOR
Voltage above which UVLO is not
asserted
2.3
V
AVIN Under Voltage
Lock-Out Falling
AVIN_OVLOF
Voltage below which UVLO is
asserted
2.1
V
AVIN pin Input Current
Internal Linear
Regulator Output
I_AVIN
AVINO
7
mA
3.3
V
Shut-Down Supply
Current
Feedback Pin Voltage
Feedback Pin Voltage
Feedback Pin Input
Leakage Current
IPVIN_S PVIN=12V, AVIN=3.3V, ENABLE=0V
500
μA
IAVIN_S PVIN=12V, AVIN=3.3V, ENABLE=0V
50
μA
V_FB
VIN = 12V, I_LOAD = 0, TA = 25°C Only
0.7425 0.750 0.7575
V
V_FB
4.5V ≤ VIN ≤ 14V; 0A ≤ I_LOAD ≤ 4A
0.735 0.750 0.765
V
VFB pin input leakage current
I_FB
(Note 3)
-5
5
nA
V_OUT Rise Time
Soft-Start Capacitor
Range
t_RISE
C_{SS_RANGE}
C_SS = 47nF (Note 4 and Note 5)
3.2
ms
10
47
68
nF
Maximum Continuous
Output Current
I_{OUT_Max_Cont}
4
A
Over Current Trip Level
Disable Threshold
ENABLE Threshold
ENABLE Lockout Time
ENABLE Input Current
Switching Frequency
External SYNC Clock
Frequency Lock Range
I_OCP
V_DISABLE
V_ENABLE
T_ENLOCKOUT
I_ENABLE
F_SW
Reference Table 2
ENABLE pin logic Low
ENABLE pin logic High
180k internal pull-down (Note 3)
R_FS =3kΩ
F_{PLL_LOCK} Range of SYNC clock frequency
6
A
0.0
0.6
V
1.8
AVIN
V
8
ms
4
μA
1.0
MHz
0.9
1.3
MHz
S_IN Threshold – Low
V_{S_IN_LO} S_IN clock logic low level
S_IN Threshold – High
V_{S_IN_HI} S_IN clock logic high level
1.8
S_OUT Threshold – Low V_{S_OUT_LO} S_OUT clock logic low level
S_OUT Threshold –
High
V_{S_OUT_HI} S_OUT clock logic high level
1.8
0.8
V
2.5
V
0.8
V
2.5
V
POK Lower Threshold
POK Output low Voltage
POK Output Hi Voltage
POK pin V_OH leakage
current (Note 3)
POK_LT
V_POKL
V_POKH
I_POKL
V_OUT / V_{OUT_NOM}
With 4mA current sink into POK
PVIN range: 4.5V ≤ V_IN ≤ 14V
POK high
90
%
0.4
V
AVIN
V
1
µA
Note 3: Parameter not production tested but is guaranteed by design.
Note 4: Rise time calculation begins when AVIN > V_UVLO and ENABLE = HIGH.
Note 5: V_OUT Rise Time Accuracy does not include soft-start capacitor tolerance.
©Enpirion 2012 all rights reserved, E&OE
06878
Enpirion Confidential
April 16, 2012
www.enpirion.com, Page 5
Rev: B