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參數(shù)資料
型號: TPS53851RHHT
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: SWITCHING CONTROLLER, PQCC36
封裝: PLASTIC, VQFN-36
文件頁數(shù): 45/66頁
文件大小: 1264K
代理商: TPS53851RHHT
www.ti.com
SLUS985 – DECEMBER 2009
2.5
ELECTRICAL CHARACTERISTICS
TJ = –40°C to 85°C, (unless otherwise noted), VVDD = 7 V, VBP5 = 5 V, UVLO_CE1, UCLO_CE2: 10 k, Pullup to BP5,
f SW = 300 kHz, unless otherwise noted
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VDD INPUT SUPPLY
VVDD
Operating voltage range
4.5
12
15
V
IVDDSD
Shutdown current
UVLO_CE1 = UVLO_CE2 =GND
1
10
μA
BP5 INPUT SUPPLY
VBP5
Operating voltage range
4.5
5.0
5.5
V
IBP5
BP5 operating current
2
3
5
mA
VBP5UV
Rising BP5 turn-on
4.0
4.25
4.45
V
VBP5UVH
BP5 turn-off hysteresis
100
220
400
mV
Standby mode current(1)
UVLO_CEx =1.7V
2.8
mA
VREG
VVREG
Output voltage
7 V < VDD <15 V
4.5
5.1
5.5
V
IVREG
Output current
0
100
mA
OSCILLATOR, RT
Phase frequency accuracy
RRT= 110 k
300
kHz
Phase frequency set range
150
1000
kHz
VRT
Timing resistance(1)
25 k
≤ RRT ≤ 500 k
0.7
V
UNDERVOLTAGE LOCKOUT (UVLO_CE1, UVLO_CE2)
Enable threshold, standby mode
Internal 5VREG regulator enabled
0.5
1.0
1.5
V
UVLO threshold
PWM Switching enabled
1.9
2
2.1
V
UVLO hysteresis
At the UVLO_CEx pin
40
mV
UVLO_CE1, UVLO_CE2 bias current(1)
1
μA
PWM
2-phase, 4-phase, 8-phase or 16-phase
87.5%
D
Maximum duty cycle per channel(1)
3-phase, 6-phase, or 12-phase
83.3%
tON(min)
Minimum controllable pulse width
70
ns
VSHARE
IVSHR = 0
1.785
1.800
1.815
V
VVSH
Current share reference
-30
μA < IVSHR < 50 μA
(1)
1.785
1.800
1.815
V
ERROR AMPLIFIER CH1, ERROR AMPLIFIER CH2
Input common mode range(1)
0
0.7
2.0
V
IIB
Input bias current(1)
VFB = 0.7 V
10
nA
VREF
FBx voltage(1)
0.6965
0.700
0.7035
V
IOH
Output source current
VCOMP = 1.1 V, VFB = 0.6 V
1
2
mA
IOL
Output sink current
VCOMP = 1.1V, VFB = BP5
1
2
mA
EAGBWP
BW(1)
8
12
MHz
AOL
Open loop gain(1)
60
90
dB
VOLTAGE TRACKING (TRK1, TRK2)
After EN, before PWM and during
5
6.0
7.3
μA
hiccup mode
ISS
SS source current
After first PWM pulse
10
12.5
15
μA
VSS_FE
Fault enable threshold(1)
1.4
V
Internal clamp voltage(1)
2.4
V
SS sink resistance(1)
Pull-down resistance
1
k
(1)
Ensured by design. Not 100% production tested.
Copyright 2009, Texas Instruments Incorporated
DEVICE RATINGS
5
Product Folder Link(s): TPS53851
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