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LMZ23608TZE bảng dữ liệu(PDF) 5 Page - Texas Instruments

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LMZ23608
www.ti.com
SNVS708G – MARCH 2011 – REVISED AUGUST 2015
6.5 Electrical Characteristics
Limits are for TJ = 25°C unless otherwise specified. Minimum and Maximum limits are ensured through test, design or
statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference
purposes only. Unless otherwise stated the following conditions apply: VIN = 12V, VOUT = 3.3V
PARAMETER
TEST CONDITIONS
MIN(1)
TYP(2)
MAX(1)
UNIT
SYSTEM PARAMETERS
ENABLE CONTROL
1.274
VEN
EN threshold
VEN rising
V
over the junction temperature (TJ) range
1.096
1.452
of –40°C to +125°C
IEN-HYS
EN hysteresis source current
VEN > 1.274 V
13
µA
SOFT-START
50
ISS
SS source current
VSS = 0 V
µA
over the junction temperature (TJ) range
40
60
of –40°C to +125°C
tSS
Internal soft-start interval
1.6
ms
CURRENT LIMIT
ICL
Current limit threshold
DC average
10.5
A
INTERNAL SWITCHING OSCILLATOR
Free-running oscillator
fosc
Sync input connected to ground
314
359
404
kHz
frequency
fsync
Synchronization range
Vsync = 3.3 Vp-p
314
600
kHz
Synchronization logic zero
over the junction temperature (TJ) range
VIL-sync
Relative to AGND
0.4
V
amplitude
of –40°C to +125°C
Synchronization logic one
over the junction temperature (TJ) range
VIH-sync
Relative to AGND
1.8
V
amplitude
of –40°C to +125°C
Synchronization duty cycle
SyncDC
15%
50%
85%
range
REGULATION AND OVERVOLTAGE COMPARATOR
0.795
VSS >+ 0.8 V
VFB
In-regulation feedback voltage
V
over the junction temperature (TJ) range
IO = 8 A
0.775
0.815
of –40°C to +125°C
Feedback over-voltage
VFB-OV
0.86
V
protection threshold
IFB
Feedback input bias current
5
nA
Non-switching quiescent
IQ
SYNC = 3 V
3
mA
current
ISD
Shutdown quiescent current
VEN = 0 V
32
μA
Dmax
Maximum duty factor
85%
THERMAL CHARACTERISTICS
TSD
Thermal shutdown
Rising
165
°C
TSD-HYST
Thermal shutdown hysteresis
Falling
15
°C
PERFORMANCE PARAMETERS(3)
ΔVO
Output voltage ripple
BW at 20 MHz
24
mVPP
ΔVO/ΔVIN
Line regulation
VIN = 12V to 20 V, IOUT= 8 A
±0.2%
ΔVO/ΔIOUT
Load regulation
VIN = 12 V, IOUT= 0.001 A to 8 A
1
mV/A
η
Peak efficiency
VIN = 12 V, VOUT = 3.3 V, IOUT = 5 A
89.5%
η
Full load efficiency
VIN = 12 V, VOUT = 3.3 V, IOUT = 8 A
88.5%
(1)
Minimum and Maximum limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through
correlation using Statistical Quality Control (SQC) methods. Limits are used to calculate Average Outgoing Quality Level (AOQL).
(2)
Typical numbers are at 25°C and represent the most likely parametric norm.
(3)
Refer to BOM in Table 1.
Copyright © 2011–2015, Texas Instruments Incorporated
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