参数资料
型号: SC470ITSTRT
厂商: Semtech
文件页数: 4/31页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM 14-TSSOP
标准包装: 1
PWM 型: 控制器
输出数: 1
电源电压: 5 V ~ 5.5 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 125°C
封装/外壳: 14-TSSOP(0.173",4.40mm 宽)
包装: 标准包装
产品目录页面: 1358 (CN2011-ZH PDF)
其它名称: SC470ITSDKR
NOT RECOMMENDED FOR NEW DESIGN
POWER MANAGEMENT
Electrical Characteristics (Cont.)
SC470
P a r a m e t e r
C o n d i t i o n s
2 5 ° C
- 4 0 ° C t o 1 2 5 ° C
U n i t s
M i n
T y p
M a x
M i n
M a x
F a u l t P r o t e c t i o n ( C o n t . )
P G D F a u l t D e l a y
F B f o r c e d o u t s i d e P G D w i n d o w .
5 . 0
μ s
V C C A U n d e r v o l t a g e
F a l l i n g ( 1 0 0 m V H y s t e r e s i s )
4 . 0
3 . 7
4 . 3
V
T h r e s h o l d
O v e r T e m p e r a t u r e L o c k o u t
1 0 O C H y s t e r e s i s
1 6 5
C
I n p u t s / O u t p u t s
L o g i c I n p u t L o w V o l t a g e
L o g i c I n p u t H i g h V o l t a g e
E N / P S V l o w
E N H i g h , P S V l o w
2 . 0
1 . 2
V
V
( P i n F l o a t i n g )
L o g i c I n p u t H i g h V o l t a g e
E n a b l e / P o w e r S a v e I n p u t
R e s i s t a n c e
E N / P S V h i g h
R P u l l u p t o V C C A
R P u l l d o w n t o V S S A
1 . 5
1
3 . 1
V
M ?
M ?
S o f t S t a r t
S o f t - S t a r t R a m p T i m e
U n d e r - V o l t a g e B l a n k T i m e
E N / P S V h i g h t o P G D h i g h
E N / P S V h i g h t o U V h i g h
4 4 0
4 4 0
c l k s ( 4 )
c l k s ( 4 )
G a t e D r i v e r s
D e a d T i m e
D H o r D L r i s i n g
3 0
n s
D L P u l l - D o w n R e s i s t a n c e
D L S i n k C u r r e n t
D L P u l l - U p R e s i s t a n c e
D L S o u r c e C u r r e n t
D H P u l l - D o w n R e s i s t a n c e
D H P u l l - U p R e s i s t a n c e
D H S i n k / S o u r c e C u r r e n t
D L l o w
D L = 2 . 5 V
D L h i g h
D L = 2 . 5 V
D H l o w , B S T - L X = 5 V
D H h i g h , B S T - L X = 5 V
D H = 2 . 5 V
0 . 8
3 . 1
2
1 . 3
2
2
1 . 3
1 . 6
4
4
4
?
A
?
A
?
?
A
Notes:
(1) Calculated from package in still air, mounted to 3” x 4.5”, 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.
(2) When the inductor is in continuous and discontinuous conduction mode, the output voltage will have a DC regulation level higher than the
error-comparator threshold by 50% of the ripple voltage. This voltage will vary slightly with load and VBAT.
(3) Using a current sense resistor, this measurement relates to PGND minus the voltage of the source on the low-side MOSFET. These values
guaranteed by the ILIM Source Current and Current Comparator Offset tests.
(4) clks = switching cycles.
? 2005 Semtech Corp.
4
www.semtech.com
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