en5311qi-e Enpirion, en5311qi-e Datasheet - Page 5

• Manufacturer Part Number: en5311qi-e
• Description: 1a Synchronous Buck Regulator With Integrated Inductor
• Manufacturer: Enpirion

Electrical Characteristics
NOTE: T
NOTE: V
† Parameter guaranteed by design.
©Enpirion 2009 all rights reserved, E&OE
03799
Operating Input Voltage
Under Voltage Lockout
UVLO Hysteresis
V
V
Causes (VID)
Feedback Pin Voltage
Feedback Pin Voltage
Feedback Pin Input Current
Dynamic Voltage Slew
Rate
Output Current
Shut-Down Current
Quiescent Current
PFET OCP Threshold
VS0-VS1 Thresholds
VS0-VS2 Pin Input Current
Enable Voltage Threshold
Enable Pin Input Current
Operating Frequency
PFET On Resistance
NFET On Resistance
Typical inductor DCR
Soft-Start Operation
V
Soft Start Rise Time
OUT
OUT
OUT
1. See Section “Application Information” for specific circuit requirements
2. Measured from when V
†
Initial Accuracy (VID)
Variation for all
Soft Start Slew Rate
PARAMETER
IN
A
= 25°C unless otherwise noted. Typical values are at V
must be greater than V
†
SYMBOL
IN
R
R
V
OUT
ΔV
V
V
F
ΔT
V
I
V
V
V
I
DS(ON)
DS(ON)
≥ V
I
V
UVLO
I
OUT
I
I
VSX
OUT
OUT
LIM
OSC
slew
SD
EN
FB
TH
FB
FB
IN
SS
SS
+ 0.6V.
UVLO
& ENABLE pin crosses its logic High threshold
Using VID
Using External Divider (VFB)
V
2.4V ≤ V
T
2.4V ≤ V
T
2.4V ≤ V
TA = 25C; VSO=VS1=VS2=1
2.4V ≤ V
T
VSO=VS1=VS2=1
Enable = Low
No switching
2.4V ≤ V
0.6V ≤ V
Pin = Low
Pin = High
Logic Low
Logic High
V
VID Mode
VFB mode
IN
A
A
A
IN
= 25C
= -40°C to +85°C
= -40°C to +85°C;
going low to high
= 3.6V
TEST CONDITIONS
IN
IN
IN
IN
IN
OUT
≤ 5.5V, I
≤ 5.5V, I
≤ 6.6V, I
≤ 6.6V, I
≤ 6.6V,
2
2
≤ V
11/24/2009
IN
5
– 0.6V
LOAD
LOAD
LOAD
LOAD
IN
= 100mA;
= 0 - 1A,
= 100mA
= 0 - 1A,
= 3.6V, C
1
IN
= 4.7μF, C
0.591
0.585
1000
1.24
1.24
0.80
MIN
-2.0
-3.0
2.4
2.4
1.4
0.0
1.4
0.0
1.4
OUT
=10uF.
0.145
0.603
0.603
TYP
1.65
0.75
.110
1.65
1.10
800
340
270
2.2
1
2
1
2
4
www.enpirion.com
0.615
0.621
MAX
+2.0
+3.0
1.40
5.5
6.6
2.3
2.1
0.4
0.2
2.1
V
V
IN
IN
EN5311QI
UNITS
V/mS
V/mS
MHz
mΩ
mΩ
mA
mS
nA
μA
μA
nA
μA
%
%
V
V
V
V
V
V
A
V
Ω
Rev:B